Generation of Stable Cell Lines by Retrovirus-Mediated Gene Transfer Techniques
Using a retrovirus vector system to generate stable cell lines has several distinct advantages over using other vector systems:

• A retroviral vector has the ability to transform its single-stranded RNA (ssRNA) genome into a double-stranded DNA (dsDNA) molecule and stably integrate into a host genome at the transcriptional active site.
• All viral structural genes of the retrovirus are removed in the expression vector to prevent revertant recombination, making the retroviral vector a safe and powerful tool for gene transfer.
• Retroviral vector-mediated gene transfer has been widely used in the development of gene therapy.
• Retroviral vectors are compatible with dividing cells and other primary cells.
• The retroviral vector, which is capable of infecting both mouse and human cells, is based on Moloney murine and leukemia viruses (Mo-MLV).
• The viral genes (gag, pol, and env) in the retroviral system are replaced with the transgene and expressed in trans in the packaging cells.

Cell Sorting to Select Integrated Cells

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