>sp|A2SQG9|MCH_METLZ Methenyltetrahydromethanopterin cyclohydrolase OS=Methanocorpusculum labreanum GN=mch MVSVNELGLDLFEELVENADLFNVAYHELDNGSRVVDCGVSVPGGYGAGDYFTRICMGGL GDIAFRQGMVGQFPMTFIDVNTDFPAISCLGSQKAGWTVKHDNFFAMGSGPARALSLQPK HTFEVIGYEDESDAAVICLEADRLPSGAVMEMIAEKCKVDVANVCALVAPTSSLVGSIQV AGRCVETAVYKLNELGFDTTKIIAAAGTAPIPPVRGAKLAMGVTNDATIYHGQINLTMNA PEIVDYLEKIPSCSSNGYGKPFNDIFKEAGYDFYKIDKSLFSPAEVIINEVSTGKVYQVG KVDTAVTLKSFGLA