Immunogen sequence: WTPLMMACTR KNLGVIQELV EHGANPLLKN KDGWNSFHIA SREGDPLILQ YLLTVCPGAW KTESKIRRTP LHTAAMHGHL EAVKVLL Highest antigen sequence identity to the following orthologs: Mouse - 90%, Rat - 89%. Required to prevent the misactivation of serine (Ser