3.4.23.23	-	
3.4.23.23	ammonium sulfate precipitation, DEAE-52 column chromatography and Sephadex G-100 gel filtration	
3.4.23.23	HiTrap column chromatography	
3.4.23.23	partially purified by 30% (w/v) polyethylene glycol/ 13.2% (w/v) sodium sulfate aqueous two-phase systems	
3.4.23.23	purification by direct extraction of a fermentation system