   2.5.1.59 | centrifugation of cells, frozen paste resuspended in 20 mM Tris, pH 7.7 with 5 mM dithiothreitol, and 5 microM ZnCls, and protease inhibitor tablet, cells lysed with pressure homogenization, crude lysate clarified by centrifugation, applied to DEAE Sepharose column, fractionation with buffer and varying NaCl concentrations, pooling of fractions, addition of substrate geranylgeranylpyrophosphate to displace nonspecifically bound lipids, phenyl-Sepharose column fractionation with gradient of buffer with (NH4)2SO4, pooled fractions applied to Q-Sepharose column, fractionated with gradient of buffer and NaCl, concentration of active fractions, application to a 120-ml Superdex 16/10 gel filtration column, concentration of enzyme |
