Positive Samples: Mouse brain, Rat heart Immunogen sequence: DGGDAPSPSK RPWARQENQE AEREGGMSCS CSSGSGEASA GLMEEALPSA PERLALDYIV PCMRYYGICV KDSFLGAALG GRVLAEVEAL KRGGRLRDGQ. Prolyl hydroxylase domain proteins HIF PHD1, HIF PHD2 and HIF PHD3 (known as PHD1,