Here, we describe how the protein expression of human gene fragments in E. coli strains BL21(DE3) and Rosetta(DE3) was evaluated in two stages. Initially a test set of 68 recombinant proteins that previously had been expressed in BL21(DE3) was retransformed and expressed in Rosetta(DE3).
BL21, Tunerâ„¢ and Origami hosts in one strain background. The trxB and gor mutations are selectable on kanamycin and tetracycline, respectively; therefore, these strains are recom-mended for use only with pET plasmids carrying the ampicillin resistance marker bla. Rosettaâ„¢ Rosetta host strains are BL21 lacZY (Tunerâ„¢) derivatives designed
BL21(DE3) Competent E.coli: C2527: 6 x 0.2ml: Agilent SURE2 Competent Cells: Agilent : 200152: 10 x 0.10ml: NEB Stable Competent E. coli (High Efficiency) C3040: 20 x 0.05ml: XL1-Blue MRF' Supercompetent Cells: Agilent: 200230: 5 x 0.2 mL: NEB ® Stable Competent E. coli (High Efficiency) C3040: 6 x 0.2 mL: BL21(DE3)pLysS Competent Cells
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