hisI Phosphoribosyl-AMP cyclohydrolase 131 MTDTTYDNSTELDPRIAARLKRDAKGLVAAVIQQYDTREVLMVGYMNDEALRRTLTTGRVTFWSRSRQEYWRKGDTSGHVQYVKGVSLDCDGDALLVEVDQVGAACHTGKRSCFLEGGPLPVVEGHRPAEQ BLD_0412 HIS3_BIFLD