T7 RNA Polymerase

Catalog No. 1290

Availability: In stock

Price From: $60.00

Quick Overview

Unmodified T7 RNA Polymerase useful in preparing single-stranded RNA transcripts

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Price From: $60.00



bacteriophage T7 of Escherichia coli


  • DNA-dependent RNA polymerase which has stringent specificity for T7 phage promoters sequence (1)
  • Ultrapure recombinant enzyme


  • Efficiently synthesizes in vitro transcripts from almost any DNA that is downstream from a T7 promoter (2)
  • Suitable for preparing labeled single-stranded RNA probes of high specific activity (3)
  • Transcripts can be used as hybridization probes, templates for in vitro translation, substrates in RNA processing systems, or exon and intron mapping of genomic DNA

Reagents Supplied

10X T7 RNA Polymerase Reaction Buffer

Unit Definition

One unit is the amount of enzyme required to incorporate 1 nmol of labeled UTP into acid insoluble material for 60 minutes at 37°C


20 - 25 Units/µl

Storage Buffer

20 mM potassium phosphate (pH 7.5)
100 mM NaCl
1 mM dithiothreitol
50% (w/v) glycerol

Assay Conditions

40 mM Tris-HCl (pH 7.9)
8 mM MgCl2
10 mM dithiothreitol
4 mM spermidine (HCl)3
1 ug pGEM-7Zf(+) plasmid
0.4 mM each of ATP, CTP, GTP and [α-32P]UTP
Reaction volume is 25 µl

Storage Conditions

Store at -20°C
Shipped on Dry Ice


Certificate of Analysis PDF -Current Lot


(1) Chamberlin, M. and Ring, J. (1973) J. Biol. Chem. 248, 2235-2244
(2) Tabor, S. and Richardson, C.C. (1985) Proc. Natl. Acad. Sci. USA 82, 1074-1078
(3) Sambrook, J., Fritsch, E.F. and Maniatis, T. (1989) Mol. Cloning: A Lab. Manual, Second Ed., pp. 10.27-10.37