Anti-guanine nucleotide binding protein (G protein), alpha z polypeptide antibodies are used in antigen-specific immunodetection in biological samples. The target guanine nucleotide binding protein (G protein), alpha z polypeptide is a known alias name of the protein G protein subunit alpha z, encoded by the GNAZ gene in humans. This 355-amino acid residue protein is known to be involved in GPCR signaling pathways, among other biological processes. It is localized to the membrane of the cell. It is reported to be expressed in the gallbladder, colon, cerebral cortex, and cerebellum. Other synonyms for guanine nucleotide binding protein (G protein), alpha z polypeptide include HG1H, gz-alpha, and guanine nucleotide-binding protein G(z) subunit alpha.