Cell Biology and Biotechnology: Novel Approaches to Increased Cellular Productivity contains the proceedings of the symposium by the same name held in Cambridge, Massachusetts, January 30 - February 2, 1992. State-of-the-art research is presented on: the IGF-1 Receptor and Gene Expression During the Cell Cycle; Attachment Control of Fibroplast Proliferation; Cell Biology and Serum-Free Mouse Embryo Cells; Immunoglobulin Production Stimulating Factors; Erythropoietin Control of Programmed Death in Erythroid Progenitors; Prohormone Processing Enzymes and Protein Production; Control of Translation Initiation by Phosphorylation; Protein Retention in the Endoplasmic Reticulum Mediated by GPR78; Molecular Approaches Towards Manipulating the Expression of the Glucose Related Proteins in Mammalian Cells; Protein Folding in the Endoplasmic Reticulum; Sorting of Membrane Proteins in the Endocytic and Exocytic Pathways; CIS-Acting Elements Which Regulate Immunoglobulin Gene Transcription.