>sp|B6IWI6|HIS4_RHOCS 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase OS=Rhodospirillum centenum GN=hisA MNIYPAIDLKDGQAVRLLRGDMDQATVFNPDPAAQAAAFQDQGFRWLHLVDLNGAFAGRP VNADAVSRILERVTIPVQLGGGIRDMATIEEWLGRGIRRVILGTVALRDPDLVKDACRAF PGRICVGIDARDGHVAVEGWATTSDVRALDLALRFEDAGVAAIVYTDINRDGAMGGVNVE ATADLAVHLTTPVIASGGVHALSDLLALKAEAETGIEGVIVGRALYDGRIDPRQALALTA GPEDARC