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CleanCap® Reagent M6 - (N-7453)

CleanCap ® Reagent m6AG (3’OMe) for co-transcriptional capping of mRNA, m7(3’OMeG)(5’)ppp(‘5)m6(2’OMeA)pG
In stock
Product SKU Quality Grade Unit Size Price Qty
N-7453-1 RUO 1 µmole
N-7453-5 RUO 5 µmole
N-7453-10 RUO 10 µmole
N-7453-100 RUO 100 µmole
FN-7453-1mmol GMP 1 mmol Inquire
FN-7453-10mmol GMP 10 mmol Inquire

TriLink's patented CleanCap® Reagent M6 [CleanCap m6AG (3’ OMe)], is designed for the co-transcriptional capping of mRNA to produce an mRNA with base modified Cap 1. Cap 1 mRNAs have superior in vivo activity compared to Cap 0 mRNAs produced by legacy capping methods. The addition of a methyl group on position 6 of the first adenosine (m6A) may further increase protein expression relative to CleanCap AG or CleanCap AG (3’OMe). It has been hypothesized that the m6A modification adjacent to the 7-methylguanosine cap can positively influence mRNA stability by preventing enzyme-mediated decapping (Mauer et al. 2017)

CleanCap M6 uses the same 5’ AG initiation sequence as CleanCap AG and CleanCap AG (3’OMe). 

It has been shown to provide > 95% capping efficiency and typical crude yields of 4 mg to 5 mg per mL of transcription.

CleanCap M6 can be used in conjunction with wildtype bases or TriLink’s catalog of modified NTPs, such as N1-Methylpseudouridine-5’-Triphosphate (N-1081), Pseudouridine-5’-Triphosphate (N-1019), and 5-Methoxyuridine-5’-Triphosphate (N-1093)

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Product details
Catalog No N-7453
Purity ≥95% by AX-HPLC
Extinction Coefficient 34,381 Lmol-1cm-1 at 257 nm ± 3 nm in 100mM Sodium Phosphate Buffer pH 7.0
Molecular Formula C34H48N15O24P4 (free acid)
Molecular Weight 1173.73 g/mole (free acid)
Salt Form Na+
Concentration 100 mM
Buffer H2O
Recommended Storage -20°C or below
Other Name(s) CleanCap ® Reagent m6AG (3’OMe) for co-transcriptional capping of mRNA, m7(3’OMeG)(5’)ppp(‘5)m6(2’OMeA)pG
Application CRISPR, In vitro Transcription, Recombinases, TALENS, Transposases, Vaccine Development, Zinc Finger Nucleases
Backbone 5'-5'-Triphosphate
Base Analog(s) Adenosine, Guanosine
Nucleotide Category Cap analogs
Cap Analogs CleanCap Cap Analogs
Technical documents

Safety Data Sheet Look-up

N-7453 Product Insert

Products faqs

Yes, CleanCap M6 initiates on "AG" templates at the +1 and +2 position downstream of the TATA box.

Yes, the lower pH is critical for maintaining capping efficiency and reaction kinetics in IVT. Please follow appropriate safety measures while preparing and handling the 10x reaction buffer. Once mixed, the 10x solution can be stored for up to 1 month at at –20 C. For best results avoid excessive freeze thaws.

Yes, both the pH and high concentration of CleanCap M6 are necessary to achieve high capping efficiency with the m6A modification. Using lower concentrations of CleanCap M6 will result in lower cap initiation and therefore more uncapped products from IVT.

Less than 8 mM cap analog is not advised.

You may need to extend total IVT reaction time past 4 hours to achieve maximum RNA yields. 

On our 5'UTR we have tested pulse-feed additions at 1 hour and 1.5 hours into initial reaction and observed ~2% decrease in capping efficiency. Early spike in capping efficiency still passed our 95% or higher specification.

Starting the reaction with 9 mM each NTP with 1x buffer and 10 mM cap results in little to no RNA formation. The reaction will not be balanced with enough magnesium to begin polymerization.

Starting the reaction with 9 mM each NTP and 2x reaction buffer to increase magnesium will also add extra components from the 10x reaction buffer that inhibit the reaction from reaching the desired yield. You may observe 3 mg/mL RNA from this reaction set up.

For best results we recommend storing the individual NTPs and 10x reaction buffer at 4C during the initial reaction incubation to avoid freeze thaw and prepare the spike-in mix ~5 minutes before use (addition to reaction tube).

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Intellectual property

CleanCap capping technology For Research Use Only. Not for use in humans. Not for use in diagnostic or therapeutic purposes. For additional licensing restrictions, please see the license agreement at Patents and patent pending, see

Products are for research use only, not for use in diagnostic or therapeutic procedures or for use in humans. Products are not for resale without express written permission from TriLink No license under any patent or other intellectual property right of TriLink or its licensors is granted or implied by the purchase unless otherwise provided in writing.

TriLink does not warrant that the use or sale of the products delivered hereunder will not infringe the claims of any United States or other patents or patents pending covering the use of the product alone or in combination with other products or in the operation of any process. All and any use of TriLink product is the purchaser's sole responsibility.