This latest volume in Advances in Genetics covers the genetics of Circadian rhythms. With an international group of authors this volume is the latest offering in this widely praised series."

This book provides a premier resource on understanding the ribosome's essential nature and how it interacts with other proteins and nucleic acids to control protein synthesis. As one of the central foundations in our understanding of the biology at the molecular level, this topic appeals to a wide audience, from bench researcher to clinician. With the advent of atomic scale structures, methods to visualize and separate individual molecules, and the computational power to model the complex interactions of over a million atoms at once, our understanding of how gene expression is controlled at the level of protein translation is now deeply ensconced in the biophysical realm."

The difference among pluripotent stem cells, multipotent stem cells, and unipotent stem cells is pointed out. Vast therapeutic applications of the following specific stem cells in disease and tissue injury are discussed: human embryonic stem cells, human mesenchymal stem cells, germ cell-derived pluripotent stem cells, induced pluripotent stem cells, human umbilical cord blood-derived stem cells, breast tumor stem cells,and hematopoietic stem cells. Because of the potential of human embryonic stem cells to produce unlimited quantities of any human cell type, considerable focus is placed on their therapeutic potential. Because of their pluripotency, these cells have been used in various applications such as tissue engineering, regenerative medicine, pharmacological and toxicological studies, and fundamental studies of cell differentiation. The formation of embryoid bodies, which are three-dimensional aggregates of embryonic stem cells, is explained as this is the first step in cell differentiation. Such embryoid body culture has been widely used as a trigger for the in vitro differentiation of embryonic stem cells. The basic capacity of self-renewal of human embryogenic stem cells is explained. The role of TGF-beta in the propagation of human embryonic stem cells is discussed. The differentiation of human embryonic stem cells into neurons, hepatocytes, cardiomyocytes, and retinal cells is fully explained. Donor policies for hematopoietic stem cells are also explained.

Genes interact with the environment, experience, and biology of the brain to shape an animal s behavior. This latest volume in "Advances in Genetics, " organized according to the most widely used model organisms, describes the latest genetic discoveries in relation to neural circuit development and activity.
Explores the latest topics in neural circuits and behavior research in zebrafish, drosophila, "C.elegans," and mouse modelsIncludes methods for testing with ethical, legal, and social implicationsCritically analyzes future prospects"

This is the story of a profound revolution in the way biologists explore life's history, understand its evolutionary processes, and reveal its diversity. It is about life's smallest entities, deepest diversity, and greatest cellular biomass: the microbiosphere. Jan Sapp introduces us to a new field of evolutionary biology and a new brand of molecular evolutionists who descend to the foundations of evolution on Earth to explore the origins of the genetic system and the primary life forms from which all others have emerged. In so doing, he examines-from Lamarck to the present-the means of pursuing the evolution of complexity, and of depicting the greatest differences among organisms.
The New Foundations of Evolution takes us into a world that classical evolutionists could never have imagined: a deep phylogeny based on three domains of life and multiple kingdoms, and created by mechanisms very unlike those considered by Darwin and his followers. Evolution by leaps seems to occur regularly in the microbial world where molecular evolutionists have shown the inheritance of acquired genes and genomes are major modes of evolutionary innovation.
Revisiting the history of microbiology for the first time from the perspective of evolutionary biology, Sapp shows why classical Darwinian conceptions centering on questions of the origin of species were forged without a microbial foundation, why classical microbiologists considered it impossible to know the course of evolution, and classical molecular biologists considered the evolution of the molecular genetic system to be beyond understanding. In telling this stirring story of scientific iconoclasm, this book elucidates how the new evolutionary biology arose, what methods and assumptions underpin it, and the fiery controversies that continue to shape biologists' understanding of the foundations of evolution today.

JAK tyrosine kinases and STAT transcription factors constitute a signaling pathway, which is activated by cytokines. By activating gene transcription it regulates essential biological responses to environmental cues. The Jak-Stat pathway is involved in the regulation of cell development, differentiation, proliferation and apoptosis. Improper function may contribute to hematopoietic malignancies and cancer. This book provides comprehensive insights into the latest basic and clinical developments in the field. The first part reviews recent findings and new technologies pertaining to basics of Jak-Stat function. The second part describes the evolution of Jak-Stat signaling and the role of the pathway in invertebrate organisms. The third part focuses on Jak-Stat signaling in hematopoietic cells under both physiological and pathophysiological conditions. Finally, chapters in the fourth section describe the relationship of Jak-Stat signaling to various states of disease, particularly infection, leukemias and solid cancers. The book is intended for all scientists in molecular biology, biochemistry and cell biology dealing with biomedical issues.

This laboratory manual, published in cooperation with the International Society for Transgenic Technology (ISTT), provides almost all current methods that can be applied to the creation and analysis of genetically modified animals. The chapters have been contributed by leading scientists who are actively using the technology in their laboratories. Based on their first-hand experience the authors also provide helpful notes and troubleshooting sections. Topics range from standard techniques, such as pronuclear microinjection of DNA, to more sophisticated and modern methods, such as the derivation and establishment of embryonic stem (ES) cell lines, with defined inhibitors in cell culture medium. In addition, related topics with relevance to the field are addressed, including global web-based resources, legal issues, colony management, shipment of mice and embryos, and the three R s: refinement, reduction and replacement.

DNA methylation is essential for the normal development and functioning of organisms. This volume discusses the latest developments in this very active field of research. It presents the evolution of DNA methylation, mammalian DNA methyltransferases, DNA methylation and demethlyation, DNA methylation and silencing and the role it plays in medicine including cancer.

* Discusses new discoveries, approaches, and ideas * Contributions from leading scholars and industry experts * Reference guide for researchers involved in molecular biology and related fields

This volume focuses on various approaches to studying long non-coding RNAs (lncRNAs), including techniques for finding lncRNAs, localization, and observing their functions. The chapters in this book cover how to catalog lncRNAs in various plant species; determining subcellular localization; protein interactions; structures; and RNA modifications. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Cutting-edge and innovative, Plant Long Non-Coding RNAs: Methods and Protocols is a valuable resource that aids researchers in understanding the functions of lncRNAs in different plant species, and helps them explore currently uncharted facets of plant biology.

Written by leading researchers, this text explores the intersection of genetics and metabolomics, and points the way to more comprehensive studies of inborn variation of metabolism. All chapters refer to one or more published experimental datasets.

The ability of a single genome to give rise to hundreds of functionally distinct cell type programs is in itself remarkable. Pioneering studies over the past few decades have demonstrated that this plasticity is retained throughout development, a phenomenon of epigenetic programming and reprogramming that remains one of the most fascinating areas of modern biology, with major relevance to human health and disease. This book presents the basic biology involved, including key mechanistic insights into this rapidly growing field.

This book introduces readers to the biology of leukemia stem cells (LSCs) and emphasizes the necessity and importance of targeting LSCs in the treatment of hematopoietic malignancies. It addresses the role of leukemia stem cells in different leukemia diseases and molecular signatures, as well as the metabolic and epigenetic regulation of leukemia stem cell function. With regard to solid tumors, a significant number of blood cancers are believed to be derived from leukemia stem cells (LSCs), which are responsible for disease progression, relapse and drug resistance. Consequently, new therapeutic strategies need to be developed by focusing on the complete eradication of LSCs. Given its scope, the book offers a valuable asset for graduate students and scientists in the fields of cell biology and cancer research etc.

In this volume three of the key figures in the field set out to establish some parameters for the study of creativity. After examining the earlier works on the subject, they present their current research findings, and then attempt to project where the field is likely to go in the decade ahead.

Gardner, the proponent of biological aspects of creativity, ranges widely as he examines Freud's Vienna and the features of medicine that both constrained and challenged his revolutionary idea. Csikszentmihalyi, with his exploration of genes and memes, examines individual issues as well as broader contextual concerns. Feldman concentrates on the notions of coincidence and the transformational imperative. These essays point to the rejuvenation of the field of creativity research, and suggest where the field is likely to move in the future. This work is a major synthesis of value to advanced researchers as well as students and all those concerned with creativity.

Arabidopsis Protocols, Third Edition compiles some of the most recent methodologies developed to exploit the Arabidopsis genome. These methodologies cover from the guided access to public resources, to genetic, cell biology, biochemical and physiological techniques, including both those that are widely used as well as those novel techniques likely to open up new avenues of knowledge in the future. In addition, considering the recent unparalleled progress of the "omics" tools in Arabidopsis, leading experts have contributed sections on genome, transcriptome, proteome, metabolome and other whole-system approaches. Arabidopsis thaliana is acknowledged as the most important plant model system by the scientific community and Arabidopsis research has fundamentally influenced our understanding of the basic biology and ecology of plants. Written in the successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and notes on troubleshooting and avoiding known pitfalls. Authoritative and easily accessible, Arabidopsis Protocols, Third Edition seeks to serve both experienced researchers and beginners with its detailed methodologies on this burgeoning scientific field.

The biological and genetic bases of behavioral diversity have long been topics of study within many disciplines, including evolutionary biology, genetics, ethology, sociobiology, and comparative psychology, but only relatively recently have attempts been made to bring these different approaches together. This volume covers a wide range of interdisciplinary research which uses some of the newest and most promising methods and technologies. Presented here is an overview of findings in the ongoing search for the ultimate causes of behavior in several different species, including primates, dogs, rodents, birds, and fish. Divided into five parts, the work describes research on sexual and kin selection, personality and temperament, molecular genetics of personality, color vision and body coloration, and the neurological underpinnings of complex behaviors. Valuable for researchers as well as graduate students in a wide range of fields from neuroscience to ecology, the book is also useful to those seeking to move beyond the boundaries of their own discipline and to expand their knowledge.

Since the discovery of a collagen-degrading protease in the tadpole tail in 1962, matrix metalloproteinase research has led to the discovery of more than twenty distinct vertebrate MMPs, along with a variety of homologues from diverse organisms such as the sea urchin, plants, insects, and nematode worms. Fully updating and adding to the popular first edition, Matrix Metalloproteinase Protocols, Second Edition includes a series of state-of-the-art techniques provided by eminent experts in the field. Beginning with a brief overview of the MMP arena, from how these enzymes fit into the larger degradome to what occurs when their expression and function in the mouse is modulated, the volume continues with sections on the expression and purification of MMPs and TIMPs, the detection of MMPs and TIMPs at both the protein and mRNA level, and our ability to assay MMP and TIMP activities in a wide variety of circumstances. Written in the highly successful Methods in Molecular Biology series format, chapters contain introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and notes on troubleshooting and avoiding known pitfalls.

Comprehensive and cutting-edge, Matrix Metalloproteinase Protocols, Second Edition is an ideal source for many of the essential laboratory techniques for both novice and seasoned researchers alike collected in one convenient volume.

The discovery of stress-induced mutagenesis has changed ideas about mutation and evolution, and revealed mutagenic programs that differ from standard spontaneous mutagenesis in rapidly proliferating cells. The stress-induced mutations occur during growth-limiting stress, and can include adaptive mutations that allow growth in the otherwise growth-limiting environment. The stress responses increase mutagenesis specifically when cells are maladapted to their environments, i.e. are stressed, potentially accelerating evolution then. The mutation mechanism also includes temporary suspension of post-synthesis mismatch repair, resembling mutagenesis characteristic of some cancers. Stress-induced mutation mechanisms may provide important models for genome instability underlying some cancers and genetic diseases, resistance to chemotherapeutic and antibiotic drugs, pathogenicity of microbes, and many other important evolutionary processes. This book covers pathways of stress-induced mutagenesis in all systems. The principle focus is mammalian systems, but much of what is known of these pathways comes from non-mammalian systems.

Understanding organogenesis is central to current efforts to direct stem cell differentiation and function in the context of a complex organ. Defects in organogenesis are often the major manifestations of human genetic disease syndromes. This volume describes the development of 10 major organ systems, reviewed by experts in each, to provide an up-to-date overview for researchers within and outside the field, students, teachers and clinicians.

Summarizes the key morphological and cellular events

Emphasizes up-to-date research relating to molecular control mechanisms

Draws on a range of model vertebrates and contemporary experimental approaches, including lessons learnt from human developmental disease

Distils common themes and differences for comparative studies

Highlights key remaining questions and sets the agenda for future research

This volume comprehensively covers new technologies and methodologies that have appeared for the study of mouse development.

This volume is the first of a 2 part update of volume 225, "Guide to Techniques in Mouse Development," edited by P.M. Wassarman and M.L. DePamphilis and published in 1993.

Comprehensively covers new techniques for the cryopreservation of gametes and embryos, production of transgenic and null (knockout) animals (use of ES cells), generation of conditional/inducible mutant animals, use of gene-trap mutagenesis, analysis of allele-specific expression, use of new reporter constructs, humanizing of transgenic animals, transcript profiling of mouse development, imaging of mouse development, and rederivation of animals and use of mouse genomics.

Arguing that human evolution has come to a stand-still, this book sets out to explore the evolutionary steps that have defined life on this planet. It describes the stages from cosmic to chemical and biological evolution and to the development of civilization and culture. From this scientific approach, the author concludes that new rules of ethics are required in order to maintain and improve the civilization and culture of humanity. Matare argues for corrective genetic interference and explores the moral implications.

This book summarizes the latest information and the status quo of radish genome studies to stimulate innovations and improvements in breeding techniques and to promote further advances in the field. Radish (Raphanus sativus) is a member of the Brassicaceae family and is cultivated worldwide. Its varieties have been diversified in terms of size, shape, and the color of their roots and bio-components. Thanks to the development of high-throughput molecular techniques using next generation sequencers, complete genomes of cultivated and wild radish plants have been sequenced and published with annotations of predicted genes and single nucleotide polymorphism (SNP) information between radish cultivars and accessions. These, together with the construction of a high-density genetic map of radish and profiling of expression sequences in radish organs, have accelerated genetic studies, such as the identification of genes or loci associated with root development, pungent components, and plant disease resistance. Providing an overview of these advances, this book is a valuable resource for scientists involved in plant genetic research and crop breeding.

The field of genetics is rapidly evolving, and new medical breakthroughs are occurring as a result of advances in knowledge gained from genetics research. This serial continually publishes important reviews of the broadest interest to geneticists and their colleagues in affiliated disciplines.

* Includes important reviews of the broadest interest to geneticists and their colleagues in affiliated disciplines, providing researchers an overview and synthesis of the latest findings in the area * Presents up-to-date research from leaders in the field

In recent years new discoveries have made this an exciting and important field of research. This comprehensive volume presents comprehensive chapters and detailed background information for researchers working with in the field of Nuclear Mechanics and Genome Regulation.

* Both classic and state-of-the-art methods readily adaptable and designed to last the test of time * Relevant to clinicians and scientists working in a wide range of fields

Genes interact with environment, experience, and the biology of the brain to shape an animal s behavior. This latest volume in Advances in Genetics, organized according to the most widely used model organisms, describes the latest genetic discoveries in relation to neural circuit development and activity.
* Explores latest topics in neural circuits and behavior research in zebrafish, drosophila, c.elegans, and mouse models
* Includes methods for testing with ethical, legal, and social implications
* Critically analyzes prospects future prospects

ThediscoveryofmicroRNAshasrevealedanunexpectedandspectacularadditional levelof?netuningofthegenomeandhowgenesareusedagainandagainin differentcombinationstogeneratethecomplexitythatunderliesforinstancethe brain. SincetheinitialstudiesperformedinC. elegans,wegavegoneafarwayto begintounderstandhowmicroRNApathwayscanhaveanimpactonhealthand diseaseinhuman. AlthoughmicroRNAsareabundantlyexpressedinthebrain, relativelylittleisknownaboutthemultiplefunctionsoftheseRNAmoleculesinthe nervous system. Nevertheless,we knowalready that microRNA pathways play majorrolesintheproliferation,differentiation,functionandmaintenanceofneu- nalcells. SeveralintriguingstudieshavelinkedmicroRNAsasmajorregulatorsof theneuronalphenotype,andhaveimplicatedspeci?cmicroRNAsintheregulation ofsynapseformationandplasticity. DysfunctionofmicroRNApathwaysisalso slowlyemergingasapotentialimportantcontributortothepathogenesisofmajor neurodegenerativedisorderssuchasAlzheimer'sdiseaseandParkinson'sdisease. Thesenovelinsightsappeartobeparticularpromisingfortheunderstandingofthe veryfrequentandbadlyunderstoodsporadicformsofthesediseasesascomparedto thegeneticforms. Thus,thebetterunderstandingoftheimplicationsofthisnovel ?eldofmolecularbiologyiscrucialforthebroadareaofneurosciences,fromthe fundamentalaspectstotheclinic,andfromnoveldiagnostictopotentiallythe- peuticapplicationsforsevereneurologicalandmaybepsychiatricdiseases. The presentvolumegatherscontributionstotheColloqueMe'decineetRechercheonthe implicationsofmicroRNAsinneuroscienceorganizedbytheFondationIpsen,in Paris,onApril20,2009. Ithadasobjectivetobringtogetherneuroscientistsfrom differentareasofresearchtodiscusstheircurrentinsightsintothewonderfulworld ofmicroRNAs,andtohearanddiscusstheirresearchandviewsaboutmicroRNA biologyinneuronalprocessesandinbraindisorders. BartdeStrooper YvesChristen v Acknowledgments The editors wish to thank Jacqueline Mervaillie and Sonia Le Cornec for the organizationofthemeetingandMaryLynnGagefortheeditingofthebook. vii Contents Pro?lingthemicroRNAs ...1 KennethS. Kosik,ThalesPapagiannakopoulos,NaXu, KawtherAbu-Elneel,TsunglinLiu,andMinJeongKye TheWideVarietyofmiRNAExpressionPro?les intheDevelopingandMatureCNS ...9 MarikaKapsimali InteractionsbetweenmicroRNAsandTranscription FactorsintheDevelopmentandFunction oftheNervousSystem ...19 DavidJ. Simon AmicroRNAFeedbackCircuitinMidbrainDopamineNeurons ...27 AsaAbeliovich Fine-tuningmRNATranslationatSynapseswithmicroRNAs ...35 GerhardM. Schratt NeuronalP-bodiesandTransportofmicroRNA-Repressed mRNAs ...4 5 FlorenceRage CrosstalkbetweenmicroRNAandEpigeneticRegulation inStemCells ...57 KeithSzulwach,ShuangChang,andPengJin microRNAsinCNSDevelopmentandNeurodegeneration: InsightsfromDrosophilaGenetics ...69 StephenM. Cohen ix x Contents DrosophilaasaModelforNeurodegenerativeDisease: RolesofRNAPathwaysinPathogenesis ...79 NancyM. Bonini microRNAsinSporadicAlzheimer'ThediscoveryofmicroRNAshasrevealedanunexpectedandspectacularadditional levelof?netuningofthegenomeandhowgenesareusedagainandagainin differentcombinationstogeneratethecomplexitythatunderliesforinstancethe brain. SincetheinitialstudiesperformedinC. elegans,wegavegoneafarwayto begintounderstandhowmicroRNApathwayscanhaveanimpactonhealthand diseaseinhuman. AlthoughmicroRNAsareabundantlyexpressedinthebrain, relativelylittleisknownaboutthemultiplefunctionsoftheseRNAmoleculesinthe nervous system. Nevertheless,we knowalready that microRNA pathways play majorrolesintheproliferation,differentiation,functionandmaintenanceofneu- nalcells. SeveralintriguingstudieshavelinkedmicroRNAsasmajorregulatorsof theneuronalphenotype,andhaveimplicatedspeci?cmicroRNAsintheregulation ofsynapseformationandplasticity. DysfunctionofmicroRNApathwaysisalso slowlyemergingasapotentialimportantcontributortothepathogenesisofmajor neurodegenerativedisorderssuchasAlzheimer'sdiseaseandParkinson'sdisease. Thesenovelinsightsappeartobeparticularpromisingfortheunderstandingofthe veryfrequentandbadlyunderstoodsporadicformsofthesediseasesascomparedto thegeneticforms. Thus,thebetterunderstandingoftheimplicationsofthisnovel ?eldofmolecularbiologyiscrucialforthebroadareaofneurosciences,fromthe fundamentalaspectstotheclinic,andfromnoveldiagnostictopotentiallythe- peuticapplicationsforsevereneurologicalandmaybepsychiatricdiseases. The presentvolumegatherscontributionstotheColloqueMe'decineetRechercheonthe implicationsofmicroRNAsinneuroscienceorganizedbytheFondationIpsen,in Paris,onApril20,2009. Ithadasobjectivetobringtogetherneuroscientistsfrom differentareasofresearchtodiscusstheircurrentinsightsintothewonderfulworld ofmicroRNAs,andtohearanddiscusstheirresearchandviewsaboutmicroRNA biologyinneuronalprocessesandinbraindisorders. BartdeStrooper YvesChristen v Acknowledgments The editors wish to thank Jacqueline Mervaillie and Sonia Le Cornec for the organizationofthemeetingandMaryLynnGagefortheeditingofthebook. vii Contents Pro? lingthemicroRNAs ...1 KennethS. Kosik,ThalesPapagiannakopoulos,NaXu, KawtherAbu-Elneel,TsunglinLiu,andMinJeongKye TheWideVarietyofmiRNAExpressionPro?les intheDevelopingandMatureCNS ...9 MarikaKapsimali InteractionsbetweenmicroRNAsandTranscription FactorsintheDevelopmentandFunction oftheNervousSystem ...19 DavidJ. Simon AmicroRNAFeedbackCircuitinMidbrainDopamineNeurons ...27 AsaAbeliovich Fine-tuningmRNATranslationatSynapseswithmicroRNAs ...35 GerhardM. Schratt NeuronalP-bodiesandTransportofmicroRNA-Repressed mRNAs ...45 FlorenceRage CrosstalkbetweenmicroRNAandEpigeneticRegulation inStemCells ...57 KeithSzulwach,ShuangChang,andPengJin microRNAsinCNSDevelopmentandNeurodegeneration: InsightsfromDrosophilaGenetics ...69 StephenM. Cohen ix x Contents DrosophilaasaModelforNeurodegenerativeDisease: RolesofRNAPathwaysinPathogenesis ...79 NancyM. Bonini microRNAsinSporadicAlzheimer'sDiseaseandRelated Dementias ...91 Se'bastienS. He'bert,WimMandemakers,AikateriniS. Papadopoulou, andBartDeStrooper microRNADysregulationinPsychiatricDisorders ...99 BinXu,JosephA. Gogos,andMariaKarayiorgou Index ...1 19 Contributors Abeliovich Asa Columbia University Medical Center, 630 West 168th Street, Room15-405,NewYork,NY10032,USA,aa900@columbia. edu Abu-ElneelKawther NeuroscienceResearchInstitute,DepartmentofMolecular CellularandDevelopmentalBiology,UniversityofCaliforniaSantaBarbara,USA BoniniNancyM. UniversityofPennsylvania,306LeidyLaboratories,Depa- mentofBiology,Philadelphia,PA19104,USA,nbonini@sas. upenn. edu Chang Shuang Department of Human Genetics, Emory University School of Medicine,Atlanta,GA30322,USA CohenStephenM. TemasekLifeSciencesLaboratoryLimited,1ResearchLink National University of Singapore, 117604 Singapore, SINGAPORE, steve@ tll. org. sg DeStrooperBart Centerforhumangenetics,K. U. LeuvenandDepartmentof molecularanddevelopmentalgenetics,VIBLeuven,BELGIUM GogosJosephA. DepartmentofPhysiology&CellularBiophysicsandDepa- mentofNeuroscience,ColumbiaUniversity,NewYork,USA He'bert Se'bastien S. Centre de Recherche du CHUQ (CHUL), Axe Neur- ciences,Universite'Laval,De'partementdeBiologieme'dicale,2705Boul. Laurier, LocalRC-9800,Que'bec,Qc,Canada,sebastien. hebert@crchul. ulaval. ca JinPeng DepartmentofHumanGeneticsandGraduatePrograminGeneticsand MolecularBiology,EmoryUniversitySchoolofMedicine,Atlanta,GA30322, USA,pjin@genetics. emory. edu ' ' ' ' KapsimaliMarika INSERMU784,GenetiqueMoleculaireduDeveloppement, ' Ecole Normale Superieure, 46 rue d'Ulm, 75230 PARIS Cedex 05 FRANCE, kapsimal@biologie. ens. fr xi xii Contributors Karayiorgou Maria Columbia University, Department of Psychiatry, 1051 RiversideDrive,Unit#28,NewYorkNY10032,USA,mk2758@columbia. edu Kosik Kenneth S. Neuroscience Research Institute, Department of Molecular Cellular and Developmental Biology, University of California Santa Barbara, BiologyII,Room6139A,SantaBarbara,CA93106,USA,kosik@lifesci. ucsb.