Adenylate cyclase and membrane fluidity

The relationships between membrane fluidity as induced by drug addition and the stimulation of adenylate cyclase by hormones (mainly catecholamines), GTP, Gpp(NH)p and NaF are reviewed. In particular, the data corresponding to pigeon erythrocyte membranes are reviewed and compared with other data published in the literature. A brief summary of the theories involved in fluidity measurements and their significance at the molecular level is also given for anisotropy of fluorescence and electron spin resonance.