ACT_SITE 50; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:P15367"; ACT_SITE 89; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:P15367"; ACT_SITE 114; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:P15367"