ACT_SITE 52; /note="Cysteine sulfenic acid (-SOH) intermediate"; /evidence="ECO:0000256|HAMAP-Rule:MF_00401"; ACT_SITE 52; /note="Cysteine sulfenic acid (-SOH) intermediate; for peroxidase activity"; /evidence="ECO:0000256|PIRSR:PIRSR000239-1"