Anti-G5 antibodies enable researchers to detect and measure the G5 antigen in biological samples. This target is a reported synonym of the GPANK1 gene, which encodes G-patch domain and ankyrin repeats 1. The human version of G5 has a canonical amino acid length of 356 residues and a protein mass of 39.3 kilodaltons. It is reported to be widely expressed in many tissue types. Other names for this target antigen include ANKRD59, BAT4, and D6S54E.