>sp|Q2RNA6|HIS4_RHORT 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase OS=Rhodospirillum rubrum GN=hisA MILFPAIDLKDGQCVRLRKGEMDQATVFNDSPADQAAAFALAGCRWIHVVDLNGAFAGRP VNAPAVEAILAAVDLPVQLGGGIRDLAAIDLWLDKGVRRVILGTVALRDPQLVREACKRH PGRIAVGIDARGGMVAVEGWAETSAVSALDLALRFEDAGVAAIVHTDIDRDGLLAGPNLD ATAALAERLTTPVIVSGGVASLDDLRAIRARAAAGLEGVISGRALYDGRIDLAEALAVLA D