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Promega Corporation

T4 RNA Ligase

T4 RNA Ligase catalyzes the ATP-dependent ligation of single-stranded RNA or DNA onto the 5´-phosphoryl termini of single-stranded RNA or DNA. The enzyme, purified from recombinant E. coli CA4 (RNase I-deficient), has an apparent molecular weight of 43.5kDa. T4 RNA Ligase also catalyzes the addition of [5´-32P] nucleoside 3´,5´-bis (phosphate) onto single-stranded RNA.

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T4 RNA Ligase

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T4 RNA Ligase


  • T4 RNA Ligase

    M105A1 x 500u
  • T4 RNA Ligase 10X Buffer

    M107A1 x 500μl
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  • Helix Freezer

This product is available through the Promega Helix onsite stocking program in a –20°C Helix Freezer. The program offers numerous convenient solutions to meet your lab's needs. Helix Freezers are available in two sizes: 5.7 cubic ft. or 9.7 cubic ft.

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10u/μl M1051 $ 128.00 Add to cart

QC Tests

Activity, SDS-PAGE/purity, DNase, RNase, endonuclease.


Recombinant E. coli strain.

Storage Buffer

10mM Tris (pH 7.5 at 25°C), 50mM KCl, 0.1mM EDTA, 1mM DTT, 50% glycerol, 0.1% Tween® 20.

Storage Conditions

Store at –20°C.

Unit Definition

One unit catalyzes the formation of 1nmol of [5´-32P]rA14–20 into a phosphatase-resistant form in 30 minutes at 37°C in a total volume of 30μl. The reaction conditions are: 50mM Tris-HCl (pH 7.8 at 25°C), 10mM MgCl2, 5mM DTT, 1mM ATP and 10μM [5´-32P]rA14–20.

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