Intact Genomics chemically competent DL39 (DE3) E. coli cells are specific for transformation and protein expression in order to uniformly and specifically label :e.g. phenylalanine or leucine residues. DL39 (DE3) can also be used to reduce NMR cross-labeling via transaminase activity for valine, leucine, isoleucine, aspartate, phenylalanine, tyrosine and tryptophan residues
Product Includes:
- DL39 (DE3) competent cells
- pUC19 control DNA
- Recovery medium
Genomic Features:
• Widely used host background
• T7 Expression Strain
• Deficient in both lon (1) and ompT proteases
• Resistant to phage T1 (fhuA2)
• Protease deficient B strain
Genotype:
F–ompT hsdS(rB– mB–) gal dcm λ(DE3)
Product Includes:
• BL21 (DE3) competent cells
• pUC19 control DNA
• Recovery medium