The papers selected here cover new, sensitive and rapid methods for the analysis of proteins, with special emphasis on the proteome. In addition to the experimental details, the advantages and limitations of the methodological approaches are discussed, and topics include sequencing analysis, sample preparation, mass spectrometry, NMR, analysis of post-translational modifications, purification of recombinant proteins, protein-protein and protein-DNA interactions, structure prediction, modeling and folding, functional implications of domains and newly emerging investigative methods, allowing analysis of the expression of genes.