ACT_SITE 796; /note="Proton acceptor"; /evidence="ECO:0000255|HAMAP-Rule:MF_04026"; ACT_SITE 798; /note="Cysteine radical intermediate"; /evidence="ECO:0000255|HAMAP-Rule:MF_04026"; ACT_SITE 800; /note="Proton acceptor"; /evidence="ECO:0000255|HAMAP-Rule:MF_04026"