Gamma-retrovirus (γ-retrovirus) is a genus in the Retroviridae family. Two types of γ-retroviruses are widely used in gene therapy which include MoMLV (Moloney Murine Leukemia Virus) and MSCV (Murine Stem Cell Virus). γ-retroviruses can only transduce dividing cells and can promote the efficient transfer of genes into a variety of cell types. https://www.creative-biogene.com/products/premade-retrovirus-particles.html