Escherichia coli MG1655 4Δ
The Escherichia coli MG1655 Δ4 strain is an aminotransferase-deficient mutant exhibiting auxotrophy for valine and isoleucine. This strain has been reported as a background host for assessing the aminotransferase activity of heterologously introduced genes [264].
Ancestors
Genotype with respect to parental
ΔilvE ΔtyrB ΔavtA::KmR ΔaspC::TetR
Genotype with respect to wild type
F+ (λ) | λ- | F- λ- ilvG- rfb-50 rph-1 | ΔilvE ΔtyrB ΔavtA::KmR ΔaspC::TetRBars (|) indicate differences between strains.
Modifications
| Gene | Organism | Modification |
|---|---|---|
|
Silencing
|
||
|
Silencing
|
||
|
Silencing
|
||
|
Silencing
|