>tr|R4MDI8|R4MDI8_MYCTX Phosphoribosyl-AMP cyclohydrolase OS=Mycobacterium tuberculosis CAS/NITR204 GN=hisI MTLDPKIAARLKRNADGLVTAVVQERGSGDVLMVAWMNDEALARTLQTREATYYSRSRAE QWVKGATSGHTQHVHSVRLDCDGDAVLLTVDQVGGACHTGDHSCFDAAVLLEPDD