...plasmids containing the transfer, envelope, or packaging components. The transfer plasmid encodes the gene...gamma-retroviral vectors, you need three plasmids (Figure 2): Transfer plasmid — contains transgene, sgRNA, or shRNA ...transgene, gRNA, or shRNA of interest into the transfer plasmid can be done with most standard cloning...restriction enzyme, Gibson Assembly, or Gateway. Some transfer plasmids may have limited restriction sites or...plasmids described above (envelope, packaging, and transfer) are co-transfected into the HEK293T packaging...events occur between the packaging, envelope, and transfer plasmids, and that resulting construct is packaged...virus after the initial infection. Some retroviral transfer plasmids that have been deposited with Addgene...