2.7.9.2 - 645468, 645472, 722844, 744138 2.7.9.2 19.4fold 645478 2.7.9.2 255fold 645475 2.7.9.2 Q-sepharose chromatography 676065 2.7.9.2 recombinant enzyme from overexpression, purification in a single chromatographic step 645476