>sp|B4S4H1|SYH_PROA2 Histidine--tRNA ligase OS=Prosthecochloris aestuarii GN=hisS MSHYRAVKGTRDIFPDEVAAWQYVESVIHRVASFYAFHEIRTPVFEYTDLFQRSIGATTD IVGKEMFTFQPDPNGRSITLRPEMTAGVMRAFLQGNRASESPVHKLYYISNLFRKERPQA GRQRQFCQFGAELLGASSPAAVAEVIAMMMHVFRLLGLKGLKLRINTLGSIEDRKRYRDA LREYLLPFSGELDAASLERLEKNPLRILDSKNPAVQSIVSGAPSLRDYLQPAAVEEFEEV LGYLDDRGIEYVQDPLLVRGLDYYCHTAFEVQCSDLGAQDALGGGGRYDGLARELGAGAD LPAVGFAVGMERLMIALERQGLLSTIPPKGPDVYVVLQDRAFLVHAVALCGALRDAAIST EIDLAGRSMKAQMREANRIKAAYALFVGPDEVASGVYGLKNLESSSQESRSLEAVIAELG HG