pWHERE plasmid was designed for studies of temporal expression and tissue distribution of your promoter of interest, cloned within an insulated LacZ cassette, in transgenic mice and rats. A multiple cloning site （MCS） has been added upstream of the LacZ gene for convenient cloning of your promoter of interest.
can be purchased alone or as part of a kit containing the control plasmid with the rat EF-1α promoter.

Specifications:
- LacZ transcription unit is flanked on each side by murine H19 insulators
- CpG-free LacZ Reporter Gene
- Convenient insertion of your promoter of interest
- Easy Excision of the E. coli region
- Efficient in vivo arrest of the transgene transcription