Product Name: pSF-CMV-MuKappa (SnapFast Pro™)
Product Code: OG568
Size (bp): 4576 bp
Bacterial Antibiotic Selection: KanR
Origin and Compatibility: pUC high copy derived from pBR322
Bacterial Copy Number: 500-700 per cell
Promoter: Cytomegalovirus (CMV) immediate early promoter
This expression plasmid encodes the constant region from the mouse kappa light chain antibody gene and is designed to allow the fusion of variable antibody gene segments seamlessly to create light chain cassettes. This is possible because there is a BseRI restriction enzyme site upstream of the kappa coding sequence that when cleaved produces an overhang from the first two nucleotides of the first codon of the constant region. By designing the variable regions of antibodies to have a BseRI site at the end in an opposing direction it is possible to seamlessly fuse the variable and constant domains together.Promoter Expression Level:
This plasmid contains the mammalian CMV promoter to drive gene expression. We have tested all of our mammalian promoters in a range of cell types and CMV is consistently the strongest in those we have studied. However there are many reports of the CMV promoter demonstrating silencing by methylation in long-term culture. For this reason we stock a range of other promoters that are compatible with this plasmid and are available on request.
This plasmid contains three alternative transcription terminators for mammalian bacterial and bacteriophage (T7) expression. This means that only the promoter needs to be changed to alter the expression system you are using. We sell multiple promoters that can be used in each of these systems. The presence of each terminator does not reduce expression in the alternative systems.