This plasmid is designed to express tagged proteins in E. coli. The plasmid contains a constitutive promoter (OXB20) derived from the region upstream of the E. coli RecA gene. It does not require induction or any additional components for activity. It is the strongest of the bacterial promoters that we provide and this high level of expression can cause expression problems with some proteins with poor solubility. For this reason we sell a range of bacterial promoters with different expression levels (OXB1(low)>OXB20(high)) that can be provided with the peptide tags in this plasmid on request.
About the Peptide Tag:This plasmid contains an n-terminal Chloramphenicol Acetyl Transferase (CAT) reporter tag that can be fused to a gene of interest to allow protein detection and/or purification.
Promoter Expression Level: This plasmid contains a constitutive bacterial promoter that does not require induction. It is the strongest bacterial promoter we sell and this can cause solubility and expression problems with some proteins. We also offer a range of other bacterial promoters that are compatible with this plasmid and are available on request.
Looking for more vector options to move your experiments forward faster? Consider a custom cloning vector designed and built by Oxford Genetics™. Find out more at Oxford Genetics - Sigma's partner for cloning and expression vectors for molecular biology and synthetic biology applications.
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