Capped mRNA · Ready to order

ZebraScribe SP6
Transcription Kit.

Produces high yields of ARCA-capped mRNA (20–25 µg per reaction) via in vitro transcription with ArtPure™ SP6 RNA Polymerase. It's the only mRNA kit with SP6 RNA polymerase that includes ARCA (Anti-Reverse Cap Analog) — ensuring efficient capping for maximal translation efficiency, validated in vivo via eGFP expression in zebrafish.

>99%Enzyme purity
20–25 µgCapped mRNA per reaction
100%ARCA capping efficiency
CoACertificate with every batch

Suggested IVT protocol.

We recommend reading the full user guide before starting, covering reaction setup, ARCA capping ratios and troubleshooting tips.

ZebraScribe SP6 User Guide

Full protocol, reagent volumes and capping-efficiency guidance (PDF).

📄 Download user guide
For additional information or questions, contact us.

ArtPure™ SP6, free of contaminants.

ArtPure™ SP6 is free of contaminants, ensuring a high yield of pure, properly-capped RNA. Every batch is evaluated across purity, activity, contaminant and in-vivo expression panels.

Purity

ZebraScribe SP6 Transcription Kit purity chart

RNases

ZebraScribe SP6 Transcription Kit RNases chart

Activity

ZebraScribe SP6 Transcription Kit activity chart

Proteinases

ZebraScribe SP6 Transcription Kit proteinases chart

DNases

ZebraScribe SP6 Transcription Kit DNases chart — single-stranded exonucleases, double-stranded endonucleases, double-stranded exonucleases at 0h, 4h, 16h

Protein expression

Zebrafish eGFP expression validating ZebraScribe SP6 capped mRNA

Definitions

Activity (U/µl): One enzyme unit incorporates 1 nmol of soluble RNA nucleotides into insoluble polymeric RNA per hour at 37°C.
Purity: Evaluated by SDS-PAGE, where the integrated peak area of the RNA Polymerase is compared to other protein peaks in the same lane.
Transcriptional activity: Quantification of total RNA products after in vitro transcription and RNA purification.
Proteinases: Assessed using Pierce™ Fluorescent Protease Assay Kit (ThermoFisher Scientific) following the manufacturer's guidelines.
RNases: Assessed using the RNase Alert kit (Integrated DNA Technologies), following the manufacturer's guidelines.
Double-stranded endonucleases: 2.5 µl of the SP6 RNAP are incubated with 1 µg of supercoiled plasmid DNA for 0 hours, 4 hours at 37°C and 16 hours at room temperature.
Double-stranded exonucleases: 2.5 µl of the SP6 RNAP are incubated with 0.5 µg of linearized double-stranded DNA substrate for 0 hours, 4 hours at 37°C and 16 hours at room temperature.
Single-stranded exonucleases: 2.5 µl of the SP6 RNAP are incubated with 1 µg of ssDNA substrate (calf-thymus DNA) for 0 hours, 4 hours at 37°C and 16 hours at room temperature.
Protein expression: A linear template containing an SP6 promoter, enhanced Green Fluorescent Protein (eGFP) and poly(A) tail was transcribed and capped using SP6 RNAP and an anti-reverse cap analog (ARCA), injected into zebrafish and analyzed for eGFP expression.
📄 Certificate of Analysis — COA_Z061_092024_v1

Storage & handling.

Optimal storage conditions ensure prolonged enzyme function.

Storage upon receipt

The components of the kit are stable at −20°C for up to 12 months. For extended storage, we recommend aliquoting in smaller volumes, freezing at −80°C and avoiding repeated freeze-thaw cycles.

Storage buffer

50 mM Tris-HCl, 100 mM NaCl, 20 mM DTT, 1 mM EDTA, 50% glycerol, 0.1% Triton X-100, pH 7.9.

Pack sizes & pricing.

Get in touch to get more information and a quote.

ProductSKUPack size
ZebraScribe SP6 Transcription Kit ZKT06025 25 reactions Contact us →
ZebraScribe SP6 Transcription Kit ZKT06050 50 reactions Contact us →

Need the T7 promoter instead?

Our ZebraScribe T7 Transcription Kit delivers higher capped-mRNA yield (30–35 µg per reaction) with the same ARCA Cap-0 capping.