Rabbit Polyclonal Antibody
Rab proteins belong to the Ras small GTPase superfamily. The GTP-binding Rab3 subfamily has 4 known isoforms: 3A, 3B, 3C, and 3D. Rab3 is expressed in highest concentrations in brain and endocrine tissues and is involved in regulated exocytosis of hormones and neurotransmitters. Specifically, Rab3 is thought to play a key role in presynaptic vesicle trafficking and priming.