>sp|Q8ZY14|HIS4_PYRAE 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase OS=Pyrobaculum aerophilum GN=hisA MIIPSIDIEGGRAVKRIRGQRGNYIFQGDPLELAARFRKAPLVHVVDLDGAEAGGLVNIS VISKIAEILEGRCELGGGLRSLEAVERALSLCQYAVVGSLPFKNWPLFRRAAELYRDRLA VSLDYRGGEVLVGGWREKAASIAEAVRRLEEAGPYAAVIVTSVEVEGTGGGVKADIDVKS LKRIARRVFYAGGVRDCNDVERAYALGFDGVIVGYALYAGDLKKCANWY