5.4.2.7 20 22 assay at 726977 5.4.2.7 30 - assay at 727521 5.4.2.7 45 - - 3348, 695174 5.4.2.7 65 - at pH 8.0 3348 5.4.2.7 65 - ribose 1-phosphate synthesis, at pH 8.0 3348 5.4.2.7 90 - - 662012, 746733