ACT_SITE 249; /note="Charge relay system"; /evidence="ECO:0000305|PubMed:21106526"; ACT_SITE 303; /note="Charge relay system"; /evidence="ECO:0000305|PubMed:21106526"; ACT_SITE 368; /note="Charge relay system"; /evidence="ECO:0000305|PubMed:21106526"