Immunogen sequence: SVRKFTEKHE WVTTENGIGT VGISNFAQEA LGDVVYCSLP EVGTKLNKQD EFGALESVKA ASELYSPLSG EVTEINEALA ENPGLVNKSC YEDGWLIKMT LSNPSELDEL MSEEAYEKYI KSIEE. The glycine cleavage system catalyzes the degradation of glycine. The H protein (GCSH) shuttles