ACT_SITE 125; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:O75608"; ACT_SITE 180; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:Q5VWZ2"; ACT_SITE 212; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:Q5VWZ2"