... Martin B. Rook2 and Johan W. M. Heemskerk11Departments of Biochemistry and Human Biology, University of Maastricht, the Netherlands;2Department of Medical Physiology,University Medical Centre ... probability of the receptor channels are the luminal Ca2+concentration in the endoplasmic reticulum[9,10], modulation or oxidation of the receptor sulfhydrylgroups [11–14], and phosphorylation b y ... T.,Miyawaki, A., Mikoshiba, K. , Kakkar, V.V & Authi, K. S. (1996)Distribution and activation of cAMP- and cGMP-depend ent protein k inases in highly purified hu man platelet plasma and intracellular...