Anti-GLUP antibodies enable researchers to detect and measure the GLUP antigen in biological samples. This target is a reported synonym of the PACRG gene, which encodes parkin coregulated. This protein is known to function in protein localization and spermatid development, among other biological roles. The human version of GLUP has a canonical amino acid length of 296 residues and a protein mass of 33.3 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cytoplasm of cells and notably expressed in the testis, fallopian tube, and endometrium.