Backbone size （bp）: 7567
Modifications to Backbone: EGFP is expressed from this plasmid as a marker, but it is not a fusion protein. EGFP and the shRNA oligo are flanked by LoxP sites. Cre causes both to be recombined out of the construct, turning off shRNA expression.
Cloning site 5': HpaI
Cloning site 3': XhoI
5' sequencing primer: mU6-F