The dynamic field of flavin and flavoprotein biochemistry has seen rapid advancement in recent years. This second book of the two volume set is focussing on complex flavoproteins and physical methods. It gives important new insights into the reaction mechanisms of flavin - containing enzymes and the role of flavoproteins in cell signalling pathways, and is an essential reference for all researchers in biochemistry, chemistry, photochemistry and photophysics working on flavoenzymes.