MCH_METME Methenyltetrahydromethanopterin cyclohydrolase (Fragment) SLSHEKFFSLGSGPGRALAGREELYKELGYKDSADAAVLVLESDKVPPQEVVEKVARDTGVKAENLTFILTPTRSLAGTVQIVARVLEVALHKIHTLHFPLEHVVDGMASAPLPPPAPDFLIGMGRTNDAILFGGHAHIFVKGSDEAAAKLAKELPSSASRDYGRPFAEVFKAVNM mch Catalyzes the hydrolysis of methenyl-H(4)MPT(+) to 5- formyl-H(4)MPT (By similarity). 176 Methenyl-H4MPT cyclohydrolase