2.4.2.18 6.9 - - 638665 2.4.2.18 7 - assay at 638665 2.4.2.18 7.2 - assay at 724752 2.4.2.18 7.4 7.7 - 638669 2.4.2.18 7.5 - assay at 638666 2.4.2.18 7.6 - assay at, formation of N-(5-phospho-D-ribosyl)-anthranilate 651722 2.4.2.18 8.5 9 - 759199