...plasmids, as lentiviral vectors do. For more about lentiviruses, see Addgene's lentiviral vector guide...available at Addgene. Gamma-Retrovirus Versus Lentivirus Lentiviruses and gamma-retroviruses fall under the Retroviridae...main difference between lentiviruses and gamma-retroviruses is that lentiviruses are capable of infecting...that lentiviruses can infect a greater variety of cell types than retroviruses. Both lentiviruses and ...containing only the necessary packaging genes, while lentiviruses also contain accessory genes specific to each...gamma-retroviruses may not be efficiently packaged by lentiviral packaging systems, and vice versa. Gamma-retroviral... 293T (HEK293T) cells (Figure 3A), similar to lentiviral packaging methods . The three plasmids described...