This is the second of two volumes which aim to cover all established eukaryotic transcription factor systems that are direct targets for the signal transduction pathways. Leading molecular biologists contribute reviews on topics which take a broad view, and which should be of interest to students and advanced researchers in biology and medicine. Chapters attempt to answer such fundamental questions as: what is the signal and how and when is it produced? What is the receptor, and what further signalling molecules are involved? What is the biochemistry and molecular biology of the transcription factor that is the ultimate target of the signalling pathway? What is the physiological role of factor? In Inducible Gene Expression, Volume 2, topics covered include: control of transcription in prokaryotes by small molecule ligands; PP/fatty acid receptors; retinoic acid receptors; steroid hormone receptors; TCDD receptors; thyroid hormone receptors; heat shock response; heavy metal response; and the iron regulatory protein.