Anti-GPRIN1 antibodies are used in the immunodetection of the protein G protein regulated inducer of neurite outgrowth 1. In humans, the canonical protein has a reported length of 1008 amino acid residues and a mass of 102.4 kDa. Its subcellular localization is in the cell membrane. Alternative splicing is reported to yield 2 different isoforms for this protein. It is found to be widely expressed in the central nervous system, with highest levels in spinal cord. GPRIN1 is suspected to be involved in neurite outgrowth. Post-translational modifications have been described, including palmitoylation.