Immunogen sequence: EIIADYEVHP NRRPKILAQT AAHVAGAAYY YQRQDVEADP WGNQRISGVC IHPRFGGWFA IRGVVLLPGI EVPDLPPRKP HDCVPT Highest antigen sequence identity to the following orthologs: Mouse - 91%, Rat - 90%. The exact function of the MMACHC protein is not known