Current Topics in Cellular Regulation: Volume 30 is a collection of papers that deals with eukaryotic DNA methylation, gene expression, regulation of nitrogenase activity, and the recognition of DNA by Type II restriction enzymes. Other papers discuss the mitochondrial Krebs cycle, enzyme mechanisms, transducin, and calcium-dependent cellular processes. One paper explains that methylation and demethylation of the DNA are complicated active processes, involving many aspects of the genome. The paper also notes that within the gross changes in methylation patterns, specific CpG sites play important roles in the expression or shutdown of target genes. Another paper concludes that, mono-ADP ribosylation being a mechanism of action of the diphtheria toxin, ADP ribosylation plays a role in normal cell metabolism by regulating the activity of key enzymes. One paper explains the significance of restriction enzymes into the nature of DNA-protein interactions; as well as the enzyme''s possible role in discriminating between alternative DNA sequences. Biochemists, cellular researchers, micro-biologists, bio-physicists, and academicians involved in the study of cellular biology will find the collection very useful.
