Ready-to-use ELISA kits are available for the detection of RIM1a, an alias of the protein, regulating synaptic membrane exocytosis 1. The official gene symbol is RIMS1. The protein, with a mass of 189.1 kDa and length of 1692 residues, is reported to be membrane-associated. It may be known by other names, including: RIM, RAB3IP2, rab3-interacting molecule 1, rab-3-interacting protein 2, RAB3-interacting protein 2, and regulating synaptic membrane exocytosis protein 1.