2.5.1.48 - 637423, 637427, 637435, 637439, 637440, 637444, 637449 2.5.1.48 80% homogenous 637429 2.5.1.48 hydroxyapatite column chromatography and Sephacryl S-300 gel filtration 758595 2.5.1.48 recombinant enzyme 637454 2.5.1.48 recombinant protein 687456 2.5.1.48 recombinant protein, purified to homogeneity by heat treatment followed by hydroxyapatite and gel filtration 758595 2.5.1.48 simultaneous purification of EC 4.4.1.1 and EC 4.2.99.2 637446