Anti-CYPH antibodies enable researchers to detect and measure the CYPH antigen in biological samples. This target is a reported synonym of the PPIA gene, which encodes peptidylprolyl isomerase A. This protein is known to function in the apoptotic pathway and the response to oxidative stress, among other biological roles. The human version of CYPH has a canonical amino acid length of 165 residues and a protein mass of 18 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the nucleus, cytoplasm, and is secreted of cells. CYPH is a member of the Cyclophilin-type PPIase protein family.