HiScribe™ T7 ARCA mRNA Kit#E2065

Catalog # Size Price (£)
E2065S 20 REACTIONS £303.00

Most eukaryotic mRNAs require a 7-methyl guanosine (m7G) cap structure at the 5´ end and a Poly(A) tail at the 3´ end to be efficiently translated. By using a DNA template encoding a poly(A) tail, the HiScribe T7 ARCA mRNA Kit can be used to synthesize capped and tailed mRNAs. The cap structure is added to the mRNA by co-transcriptional incorporation of Anti-Reverse Cap Analog (ARCA) (NEB #S1411) using T7 RNA Polymerase. Poly(A) tail is incorporated during the transcription reaction. The kit also includes DNase I and LiCl for DNA template removal and quick mRNA purification.

Additionally, the kit is capable of partial incorporation of modified UTP and CTP (up to 50% each) without affecting the mRNA yield significantly. By using a DNA template encoding a poly(A) tail, capped and tailed modified mRNA can be synthesized in a single reaction in 30 minutes. mRNAs synthesized with the kit can be used for cell transfection, microinjection, in vitro translation and RNA vaccines.

ARCA is incorporated into mRNA exclusively in the correct orientation, generating capped mRNA that is more efficiently translated. Standard cap analogs can be incorporated in either direction resulting in only 50% of capped mRNA that is functional in protein translation.

Figure 1. Structure of Anti-Reverse Cap Analog (ARCA, NEB #S1411)
Methylation at the 3´ position of 7mG forces the cap structure to be attached to mRNA in the correct orientation.Figure 2. Overview of mRNA synthesis work flow with the HiScribe T7 ARCA mRNA KitFigure 2. Overview of mRNA synthesis workflow with the HiScribe T7-ARCA mRNA Kit

Kit Components

The following reagents are supplied with this product:

Store at (°C)


LiCl Solution


DNase I (RNase-free)


2 units/μl

T7 RNA Polymerase Mix


CLuc Control Template


0.25 μg/μl


2 X

Properties and Usage

Materials Required but not Supplied

  • DNA template

  • Thermocycler or 37°C incubator.

  • Nuclease-free water

  • Buffer- or water-saturated phenol:chloroform

  • Ethanol

  • 3 M Sodium acetate, pH 5.2

  • 5 M Ammonium acetate

  • Spin columns

  • Gels, running buffers and gel box

  • Equipment for RNA analysis

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Safety Data Sheet

The following link is to a PDF Safety Data Sheet (SDS) that applies to this product to help you use it safely.

This product is covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB).

While NEB develops and validates its products for various applications, the use of this product may require the buyer to obtain additional third party intellectual property rights for certain applications.

For more information about commercial rights, please contact NEB's Global Business Development team at gbd@neb.com.

This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.