– VAMP3, also known as cellubrevin, is a member of the vesicle-associated membrane protein (VAMP)/synaptobrevin family. Synaptobrevins/VAMPs, syntaxins, and the 25-kD synaptosomal-associated protein are the main components of a protein complex involved in the docking and/or fusion of synaptic vesicles with the presynaptic membrane. Because of VAMP3 gene’s high homology to other known VAMPs, its broad tissue distribution, and its subcellular localization, VAMP3 was shown to be the human equivalent of the rodent cellubrevin. In platelets VAMP3 resides on a compartment that is not mobilized to the plasma membrane on calcium or thrombin stimulation.