Generation of high-titer lentivirus for the production of transgenic quail

This protocol describes how to generate high-titer lentivirus for the production of transgenic Japanese quail. The virus is pseudotyped with vesicular stomatitis virus with the envelope G glycoprotein (VSV-g), which gives a broad infectious range and allows concentration of viral supernatants by ultracentrifugation. Using this method, we typically produce titers >1 x 10(8) transforming units (TU)/mL and recommend using a virus with a titer at least this high for in vivo work.