Intact Genomics (IG®) C43(DE3) Chemically Competent Cells are optimized for the expression of toxic and difficult proteins from vectors with an IPTG-inducible T7 promoter. When protein expression gets tough, choose IG C43(DE3) competent cells. Custom formats (8-well strip tube, 96 or 384 well plate), package sizes, and bulk pricing are available upon request.

Struggling to express toxic or difficult proteins? Intact Genomics (IG®) C41(DE3) Chemically Competent 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 (8-well strip, 96 or 384 well plate), custom package sizes and bulk pricing are available upon request.