BL21 (DE3) Chemically Competent E. coli Cells

GoldBio’s DL39 (DE3) Chemically CompetentE. colicells are engineered with a T7 expression system to transform and express proteins in order to label residues such as phenylalanine or leucine. DL39 (DE3) Chemically CompetentE. colicells are deficient in the aromatic (TyrB), branched-chain (JIvE), and aspartate (AspC) transaminases and are auxotrophic for aspartic acid, isoleucine, leucine, phenylananine, tyrosine, and valine residues.Kit ComponentsCompetent Cells1 x 12 mL Recovery Media1 x 10 µL Control Plasmid (pUC19 Control, 500 pg/µL) Reagents Needed for One ReactionDL39 (DE3) chemically competent cells: 50 µLDNA (orpUC19 Control, 500 pg/µL) : 2 µLRecovery medium: 1 mL