Table of Contents - T.W. Traut and M.E. Jones, 'Uracil Metabolism--UMP Synthesis from Orotic Acid or Uridine and Conversion of Uracil to b-Alanine; Enzymes and cDNAs'. P.F. Agris, 'The Importance of Being Modified - Roles of Modified Nucleosides and Mg2+ in RNA Structure and Function'. N.A. Kolchanov, I.I. Titov, I.E. Vlassova, and V.V. Vlassov, 'Chemical and Computer Probing of RNA Structure'. Q.-P. Dou and A.B. Pardee, 'Transcriptional Activation of Thymidine Kinase, a Marker for Cell Cycle Control'. R.O. Laine, R.G. Hutson, and M.S. Kilberg, 'Eukaryotic Gene Expression; Metabolite Control by Amino Acids'. W.K. Joklik and M.R. Roner, 'Molecular Recognition in the Assembly of the Segmented Reovirus Genome'. C.W. Schmid, 'Alu - Structure, Origin, Evolution, Significance, and Function of One-Tenth of Human DNA'. H.M. Darwish and H.F. DeLuca, 'Recent Advances in the Molecular Biology of Vitamin D Action'. G.R. Greenberg and J.M. Hilfinger, 'Regulation of Synthesis of Ribonucleotide Reductase and Relationship to DNA Replication in Various Systems'. Chapter References. Index.