Contents (Volume 2A). List of Contributors. Preface (A.G. Lee). Rhodopsin Structure and Function (B.J. Litman and D.C. Mitchell). Characterization of the Primary Photochemical Events in Bacteriorhodopsin and Rhodopsin (J.A. Stuart and R.R. Birge). Light-Induced Protein-Protein Interactions on the Rod Photreceptor Disc Membrane (K.P. Hofmann and M. Heck). Microbial Sensory Rhodpsins (J.L. Spudich and D.N. Zacks). Alpha-Adrenergic Receptors (D.B. Bylund).