GENE REGULATION provides a comprehensive coverage on the regulation of gene in bacteria, viruses, and eukaryotes. The book wil also deal with often ignored but very essential aspect of gene expression, i.e., chromatin (DNA and protein) modifications that affect gene expression in bacteria, viruses, and eukaryotes that play role in gene expression. Recent aspects, i.e., modification, modulation of gene expression and exploitation of gene regulation will be dealt with in a separate chapter. Some molecular analysis tools dealing with gene expression and regulation will also be dealt with. Recent progresses have been discussed. Nobel Prize winning work finds a special mention. Various terms in the subject have been define in context of the present day knowledge. For this, there is a separate section on glossary of important terms in the book. Recent literature relevant to the subject matter has been cited and complete references are provided to the reader at the end of the subject matter. In addition, references for further reading have also been suggested. Efforts will be made to pin-point applications/implications of different discoveries in the area of molecular genetics. Text is supported by well drawn figures and tables. This book will cater to the needs of students, teachers, and research workers from agricultural, technical and conventional universities and research institutions all over the world. The book will be useful to the candidates preparing for competitive examinations/interviews.