L.A. Klobutcher and G. Herrick, Developmental Genome Reorganization in Ciliated Protozoa: The Transposon Link.D. Mu and A. Sancar, DNA Excision Repair Assays.D. Ricquier and F. Bouillaud, The Mitochondrial Uncoupling Protein: Structural and Genetic Studies.H.A. Young and P. Ghosh, Molecular Regulation of Cytokine Gene Expression: Interferong as a Model System.A.I. Roca and M. Cox, RecA Protein: Structure, Function, and Role in Recombinational DNA Repair. V. Taylor and U. Suter, Molecular Biology of Axon-Gila Interactions in the Peripheral Nervous System.L.E. Rajagopalan and J.S. Malter, Regulation of Eukaryotic Messenger RNA Turnover.R.M. Roberts, L. Liu, and A. Alexenko, New and Atypical Families of Type I Interferons in Mammals: Comparative Functions, Structures, and Evolutionary Relationships.R.C. Conaway and J.W. Conaway, General Transcription Factors for RNA Polymerase II. M.R. Rondon, J.R. Trzebiatowski and J.C. Escalante-Semerena, Biochemistry and Molecular Genetics of Cobalamin Biosynthesis.Chapter References.Index.