ACT_SITE 63; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:P67812"; ACT_SITE 101; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:P67812"; ACT_SITE 127; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:P67812"