2.4.1.279 40 - D-xylose pH 7.0, 30°C, reverse phosphorolysis, donor beta-D-glucopyranose 1-phosphate 727705 2.4.1.279 52 - D-glucose pH 7.0, 30°C, reverse phosphorolysis, donor beta-D-glucopyranose 1-phosphate 727705