B.K. May, S.C. Dogra, T.J. Sadlon, C.R. Bhasker, T.C. Cox, and S.S. Bottomley, Molecular Regulation of Heme Biosynthesis in Higher Vertebrates.P.D. Sadowski, The Flp Recombinase of the 2-mm Plasmid of Saccharomyces cerevisiae.R.A. Bambara and L. Huang, Reconstitution of Mammalian DNA Replication.E.K. Wagner, J.F. Guzowski, and J. Singh, Transcription of the Herpes Simplex Virus Genome during Productive and Latent Infection.A.E. Pegg, M.E. Dolan, and R.C. Moschel, Structure, Function, and Inhibition of O6-Alkylguanine-DNA Alkyltransferase.A.B. Chetverin and A.S. Spirin, Replicable RNA Vectors: Prospects for Cell-free Gene Amplification, Expression, and Cloning.H.L. Klein, Examination of Mitotic Recombination by Means of Hyper-recombination Mutants in Saccharomyces cerevisiae.I.S. Owens and J.K. Ritter, Gene Structure at the Human UGT1 Locus Creates Diversity in Isozyme Structure, Substrate Specificity, and Regulation.D.R. Morris, Growth Control of Translation in Mammalian Cells.Index.