5.1.99.1 - 2434, 2437, 2438, 2439, 2441, 2442, 649408, 726729 5.1.99.1 lysate is clarified by centrifugation and purified by passage through a nickel-affinity column, and a further purification step is performed by gel filtration 706660 5.1.99.1 recombinant enzyme 693174 5.1.99.1 recombinant MCE-1 661687 5.1.99.1 recombinant N-terminally His-tagged enzyme from Escherichia coli strain Rosetta 2 (DE3) by nickel affinity chromatography 726729