Lentiviral vectors are routinely used for in vivo and ex vivo gene delivery. 3rd generation lentiviral production relies
splitting the components necessary for virus production across multiple plasmids.
For convenience Oxford Genetics has combined the packing plasmids into a single ready to transfect packaging mix.
This mix (ExLenti) is combined with a Lentivirus genome plasmid (e.g. OG269 shown in the figure below)
containg the gene of interest to produce high titer Lentivirus particles.