The pF4A and pF4K CMV Flexi® Vectors are designed specifically for high-level expression of proteins in mammalian cells from the CMV promoter without a selectable marker. All inserts may be confirmed by cell-free expression with the TnT® T7 Quick System (Cat.# L1170). There are no licensing fees or complicated transfer restrictions for these vectors. Clone your ORFs and conveniently transfer the inserts to a variety of Flexi® Vectors designed for multiple applications.

About the Flexi® Vector System

The Flexi® Vector System is a simple, yet powerful, directional cloning method for protein-coding sequences. It is based on two rare-cutting restriction enzymes, SgfI and PmeI, and provides a rapid, efficient and high-fidelity way to transfer protein-coding regions between a variety of Flexi® Vectors without the need to resequence. Directly use recombinant clones and minimize time wasted screening background colonies. The versatile cloning of the Flexi® system means you can choose from a variety of expression systems and fusion tag orientations and then transfer to others as required. Direct transfers can only occur between two N-terminal tagged vectors or from an N-terminal to a C-terminal vector.

Note: Flexi® Vectors contain the lethal barnase gene to reduce background colonies without inserts during the subcloning procedure. Using the Flexi® Vector Cloning System replaces the barnase gene with your insert. These vectors, as purchased, cannot be cultured in normal laboratory strains of E. coli without an insert.

Ready-to-Use HaloTag® Flexi® Vector Clones

For access to 20,000 human and 15,000 mouse ORF clones with HaloTag® Technology in multiple mammalian expression vectors and custom cloning options, visit: www.kasuza.or.jp.kop/dsearch-e