2.1.1.218 | recombinant His-tagged full-length wild-type enzyme, truncated enzyme SaTrm10 1-249, and enzyme mutants from Escherichia coli strain Rosetta (DE3)pLysS by nickel affinity chromatography and gel filtration, recombinant nontagged wild-type enzyme by anion exchange and cation exchange chromatography, followed by gel filtration |