>tr|Q50250 F420-NONREDUCING HYDROGENASE I - Methanosarcina mazei (Methanosarcina frisia). MKSNNNPKAMVVERYTITDRIAHTVHAIAMIVLIITGLKIYAGWEFMSFHTARTLHMIAVPFLLAVNWILIPYNIFSEGH GLMGKISHFTDHYIFGPKDAVRLGGIIKNFFRKGRYPAYSIYDEEKGHYETKLHPVMKVLIVLEGTALFLITVSGIVLYK LDWSLFGLPIAQWIISISGMIAPTFGMTPVGFLRLLHLLMTYWFIFELVVHVGILGFDPHVWKYYKAIFWSGKEDFSDPY YSEYVEKYSRFDAKKEHKQVNANKEHGHQKH