ACT_SITE 196; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:W3VKA4"; ACT_SITE 348; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:W3VKA4"; ACT_SITE 381; /note="Charge relay system"; /evidence="ECO:0000250|UniProtKB:W3VKA4"