>sp|A2BW33|HIS4_PROM5 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase OS=Prochlorococcus marinus GN=hisA MKLIPAIDLMNGKCVRLFKGDFNKRKDFSRKPYEQAKYWEEQGAKCIHIVDLDAAKSGYP SNDQSIKKIAKEVNIPIQIGGGIRSLERIEQLFSYGVDKVIMGTSAIENKELVKNLSTKF PRRIIIGIDAKDGKVSTRGWIEQSDVLATDLVKEFSKFEIASFIVTDINTDGTLEGTNEV FIKKILEITDIPVIASGGVGAISDLLSLTKFEHLGLCGVIVGKALYENKFKISEANNILS PERLQDIPINKDYFA