The T7 RiboMAX™ Express RNAi System is an in vitro transcription system designed for producing milligram amounts of double-stranded RNA (dsRNA) in a short amount of time. The dsRNA is free of protein and other contaminants and is suitable for use in RNA interference (RNAi) in both mammalian and nonmammalian systems.

The T7 RiboMAX™ Express RNAi System can be used to synthesize short interfering RNAs (siRNAs) of 21bp for use in mammalian systems. siRNAs synthesized in vitro have been demonstrated to be as effective as chemically synthesized siRNAs for inducing RNAi in mammalian cells.

In addition, the T7 RiboMAX™ Express RNAi System can be used for the synthesis of dsRNA molecules of approximately 200bp or greater, which can be applied to nonmammalian systems. Two complementary RNA strands are synthesized from DNA template (either plasmid or PCR product). The resulting RNA strands are annealed after the transcription reaction to form dsRNA. Any remaining single-stranded RNA and DNA template are removed with a nuclease digestion step. The dsRNA is then purified by isopropanol precipitation and can be introduced into the organism of choice for RNAi applications.

• Save Time: The T7 RiboMAX™ Express RNAi System produces milligram amounts of RNA in as little as 30 minutes.
• Minimize Pipetting Errors: The four rNTPs and 2X transcription buffer have been combined, thus minimizing pipetting errors and setup time.

1. Yu, J.-H. et al. (2002) Proc. Natl. Acad. Sci. USA 99, 6047–52.
2. Donze, O. and Picard, D. (2002) Nucl. Acids Res. 20, e46.