INCOGNITO™ T7-FlashScribe™ N1meΨ-RNA Transcription Kit
INCOGNITO™ T7-FlashScribe™ Ψ-RNA Transcription Kit

Q: What would be the advantage of using modified nucleotides?

A: mRNAs modified with the incorporation of N1meΨTP and ΨTP have demonstrated the ability to reduce RNA-mediated innate immune activation in vivo.

Q: Are modified nucleotides included in the INCOGNITO™ T7-FlashScribe™ Transcription Kits?

A: Yes, the modified nucleotides N1meΨTP and ΨTP are included in their respective kits.

Q: I notice a white precipitate in the transcription buffer tube of my INCOGNITO™ T7-FlashScribe™ Transcription Kit. Is the buffer ok to use? How can I get rid of the precipitate?

A: The precipitate forms due to some kit components being formulated close to their solubility limits in solution. You may be able to salvage the buffer by heating to 37°C for a short period of time. The easiest way to avoid precipitation of reagents is to assemble the reaction at room temperature (22-25°C) and mix the reactions well prior to the 37°C or 42°C transcription incubation.

Q: I’m using less than the recommended 1 μg of DNA template in an INCOGNITO™ T7-FlashScribe™ transcription reaction. How can I improve my RNA yield?

A: With lower concentrations of DNA template, you can increase RNA yields by increasing the reaction time from the recommended 1 hour up to 2-4 hours, depending on the amount of template used. Increasing the reaction temperature from 37°C to 42°C also improves the yield.

Q: Why should I set up the INCOGNITO™ T7-FlashScribe™ transcription reactions at room temperature? Won’t that affect the RNA polymerase enzyme activity?

A: The components of the reagents in a standard 20 μl reaction are very close to their solubility limits. If you set up the reaction on ice, some reaction components (such as the buffer and the nucleotides) will precipitate. After components precipitate, warming the reaction tube only partially resolubilizes the reagents. The T7-FlashScribe™ Enzyme Solution is added last, so it can be kept on ice until needed.

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