Anti-gamma-aminobutyric acid type A receptor subunit pi antibodies are used for the immunodetection of the protein encoded by the GABRP gene. In humans, the canonical protein has a reported length of 440 amino acid residues and a mass of 50.6 kDa. Its subcellular localization is in the cell membrane. It is notably expressed in the uterus, also expressed in the lung, thymus and prostate. A member of the Ligand-gated ion channel (TC 1.A.9) protein family, it is known to be involved with chemical synaptic transmission and signal transduction pathways. Post-translational modifications have been described, including glycosylation. Other names for this target antigen include GABA(A) receptor subunit pi, GABA(A) receptor, pi, gamma-aminobutyric acid (GABA) A receptor, pi, gamma-aminobutyric acid type A receptor pi subunit, and gamma-aminobutyric acid receptor subunit pi. Gene orthologs have been identified in the mouse, rat, bovine, frog, chimpanzee and chicken species.