>sp|Q0W8U9|MCH_METAR Methenyltetrahydromethanopterin cyclohydrolase OS=Methanocella arvoryzae GN=mch MISINEISYSIVEEMLDFAEDYRIEPHTLANDSVVIDCGVKAKAGYEAGLLFTQVCMGGL AQTSLTHKKLKHEVFYPFIEVSTDFPAIACLAAQKAGWRISQDGYFAMGSGPARALALKP KHTYEVIEYEDDYDFAVIALEADKLPNEKVMDYIASECGVDSSDVVALVAPTNSPVGSVQ IAGRVVEMAIYKLAELGFDTRHIVSAFGSAPIPPVKKDAAVAMGTTNDASIYHGSVTLTV DGGNIKDFVPKIPSSTSKDYGKPFYTVFKEAKFDFYKLDPGIFAPAEVVVNDISTGETYI AGKINADVCMESFGFKKL