Struggling to express toxic or difficult proteins? Intact Genomics (IG®) C41(DE3) Electocompetent Cells are engineered to improve tolerance to toxic protein expression while maintaining reliable T7-driven performance. Derived from BL21(DE3), C41(DE3) strain reduces cell death associated with membrane proteins, nucleases, and other challenging targets. When standard BL21(DE3) fails, C41(DE3) helps move your project forward. Custom formats, custom package sizes and bulk pricing are available upon request.