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URL: http://www.addgene.org/62078
Proper Citation: RRID:Addgene_62078
Insert Name: none
Bacterial Resistance: None
Defining Citation: PMID:26577727
Vector Backbone Description: Vector Backbone:none; Vector Types:; Bacterial Resistance:None
Comments: Genotype = aspC tyrB trpA trpB Precursor strain = RF4 modified from the parent Escherichia coli BL21 CodonPlus (DE3)-RIL Selective amino acid labeling (and/or requirement) = Asp++++, Tyr, Trp, (Phe) ++++RF4, RF5, and RF13 strains have knockouts in both aspC and tyrB genes and therefore require the presence of L-Asp (but not L-Glu) for growth in M63 minimal medium. These strains can be used for selective labeling of selected aromatic amino acid(s) such as Tyr (RF4, RF5, RF13) and/or Trp (RF13). We have NOT tested if these strains could also be used for selective Asp labeling studies (under investigation). Each target gene was deleted from the chromosome of BL21 (DE3) E. coli strain using λ-Red recombination system. Supplemental documents contain a list of PCR primers used for verification of each knocked-out gene as well as an image showing PCR results for this strain. This work is supported in part by JSPS-NSF International Collaborations in Chemistry (ICC) research grant.
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Source: Addgene