Simultaneous expression of two or three genes by a single lentiviral vector is often required for a diverse range of applications. Until now, IRES-based elements were used for these particular applications. However, it has been well documented that the gene down-stream of IRES exhibits only low level transgene expression. In addition, the IRES element is relatively large in size (> 800bp) and its use is often limited due to the lentiviral packaging capability (<5.0kb). So development of a promoter system with bi-directional functionality was needed for simultaneous expression of two or three different genes by a single lentiviral vector. Now, ABM has developed such a system, the bicistronic vector, that is superior to IRES-based two gene expression systems because its smaller size (500bp) and stronger expression signal for both genes (Amendola et al., 2005), and with the addition of a T2A peptide to the tricistronic vector, up to 3 different genes can be expressed from the same lentiviral vector (Tang et al., 2009).
Manufacturer
ABM (Applied Biological Materials)
Product Link
LV040
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