3.1.2.22	-	23915, 23916, 23919	
3.1.2.22	by centrifugation, dialysis and gel filtration	709975	
3.1.2.22	GST affinity chromatography, GST-tag cleaved from GST-fusion protein	707548	
3.1.2.22	recombinant PPT2 from overexpressing insect cells, recombinant PPT2 mutant from COS cells	652459