...μg pLKO.1 shRNA plasmid 750 ng psPAX2 packaging plasmid 250 ng pMD2.G envelope plasmid to 20 μl serum-...to vary the ratio of shRNA plasmid, packaging plasmid, and envelope plasmid to obtain the ratio that gives...shRNA. psPAX2 Packaging plasmid for producing viral particles. pMD2.G Envelope plasmid for producing viral... also be used with packaging plasmid pCMV-dR8.2 dvpr and envelope plasmid pCMV-VSVG from Robert Weinberg...Producing Lentiviral Particles E.1 Recommended materials E.2 Protocol for producing lentiviral particles...Due to the long terminal repeats found in lentiviral plasmids, Addgene currently recommends using a strain....1 Protocol pLKO.1 - TRC Cloning Vector Addgene Plasmid 10878. Protocol Version 1.0. December 2006. Copyright...