Anti-PC1 antibodies enable researchers to detect and measure the PC1 antigen in biological samples. This target is a reported synonym of the PKD1 gene, which encodes polycystin 1, transient receptor potential channel interacting. This protein is known to function in the morphogenesis of anatomical structure and the transport of ions, among other biological roles. The human version of PC1 has a canonical amino acid length of 4303 residues and a protein mass of 462.5 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the ER, Golgi, and cell membrane of cells and notably expressed in many tissues, such as the endometrium and epididymis. PC1 is a member of the Polycystin protein family.