GCA_000013225.1 CYB_0050 definition anthranilate phosphoribosyltransferase GCA_000013225.1 CYB_0194 definition N-(5'-phosphoribosyl)anthranilate isomerase GCA_000013225.1 CYB_0535 definition anthranilate synthase component I GCA_000013225.1 CYB_2417 definition anthranilate synthase component II