1.14.13.83	-	
1.14.13.83	centrifugation of cells, pellet resuspended in binding buffer (20 mM Tris-HCl, pH 8.0, containing 0.5 M NaCl and 5 mM imidazole), cells broken up with a cell disrupter or sonicated, centrifugation, supernatant transferred to an anaerobic glove box, applied to a metal affinity chromatography column charged with Ni2+, washed with buffer with 20 mM imidazole, elution with 400 mM imidazole