Hands-on users and experts survey the key biological software packages, offering useful tips and an overview of current developments. Among the sequence analysis systems reviewed are GCG, Omiga, MacVector, DNASTAR, PepTool™, GeneTool™, and the Staden Package. Molecular biology software includes Genotator and sequence-similarity searching using FASTA, CLUSTAL multiple sequence alignment, and phylogenetic analysis. Web–based resources are examined for primary sequence databases, primary sequence analysis methods, and clinical databases useful in molecular medicine. Numerous illustrative examples to teach the reader how to solve problems are included. Bioinformatics: Methods and Protocols constitutes a gold-standard reference for today’s scientists who wish to develop and hone their bioinformatics skills towards the discovery of new biological relationships.