Gene Expression Prokaryotic Expression Vectors pQUIK-Blunt E1 Expression Kit pQUIK-Blunt E2 Expression Kit Expression Competent Cells BL21(DE3) Chemically Competent Cell BL21(DE3) pLysS Chemically Competent Cell MetaT(DE3) Chemically Competent Cell MetaB(DE3) Chemically Competent Cell BL21 Chemically Competent Cell