1.13.11.74	-	
1.13.11.74	acetone precipitation, DE52-cellulose column chromatography, DEAE-cellulofine A-500 column chromatography, and gel filtration	
1.13.11.74	ammonium sulfate precipitation, Mono Q column chromatography, and Superdex 200 gel filtration	
1.13.11.74	ethanol precipitation, MonoQ column chromatography, and Sephacryl S-300 gel filtration	
1.13.11.74	partial purification