>sp|Q4J8I7|HIS2_SULAC Phosphoribosyl-ATP pyrophosphatase OS=Sulfolobus acidocaldarius GN=hisE MSDNVIDKLYSIILDRMKTMKEGSYTVELIKRGKHYVAQKVGEESTEAIIASLVESQQRF VEEVSDLIYHLLVLMALENVTPQDVYKELERRMKK