3.6.1.22	-	171773, 209949, 209950, 209951, 670632	
3.6.1.22	membrane extraction	209954	
3.6.1.22	more than 98% purity	209957	
3.6.1.22	nickel affinity column chromatography and Superdex 200 gel filtration	720498	
3.6.1.22	purification of gene product from Escherichia coli	209959