>sp|B0R653|MCH_HALS3 Methenyltetrahydromethanopterin cyclohydrolase OS=Halobacterium salinarum GN=mch MESLNRMALELADEALEFTEELDIGAFELDTGTTVIDFGVEHDGGLEAGLLLAELQTAGL ATVQTRVDTVGDATFPHVEVACDQPAVAMLGAQKAGWELAVDDYEALGSGPARALVATEG EFQAIDYVDAFEFAVLTLESTGLPTTAAASEVAARAGVTEESVFLPTYRTASVAGSVSAA ARTVELAVFRLYELGYDPTDVLSASGCAPVAPVAGDEQTAIGRTNDALAHGGRVHLTVAE DFDAFDAVVSSAAARYDDPFAEVVGTDDWDAGDVDNGVFGPAQLTVDVVGGPTHAFGTVR EDVLADGFGLS