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Molecular Biology Tools

Products >  Molecular_Biology_Tools >  Modifying_Enzymes >  DNA_Polymerase >  Poly_A_Polymerase

Poly(A) Polymerase

Poly(A) Polymerase catalyzes the incorporation of adenine residues into the 3'-termini of RNA, effectively adding a poly(A) tail to RNA. The enzyme uses single-stranded RNA as a primer during poly(A) tailing. Poly(A) Polymerase is supplied in a buffer of 25 mM Tris-HCl (pH 7.9), 500 mM NaCl, 1 mM EDTA, 0.1 mM DTT and 50% glycerol.

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  • Poly(A) tailing of RNA
  • 3'-end RNA labeling
  • Adding a poly(A) tail to RNA  


2180A: (20 Units)

2180B: 5 x 2180A (100 Units)


E. coli B




0.2–2 U/µL


  1. Krug, M.S. and Berger, S.L. (1987) Methods Enzymol. 152:316-325.
  2. Winter, G. and Brownlee, G.G. (1978) Nucleic Acids Res. 5:3129-3139.
  3. Gething, M.J. et al. (1980) Nature 287:301-306. 

Unit Definition

One unit is defined as the amount of enzyme that incorporates 1 nmol of AMP into tRNA in 10 minutes at 37°C and pH 7.9 using ATP as the substrate.

Cat. # Product Contents Size Price Units Select
2180A Poly(A) Polymerase 20 Units $89.00
2180B Poly(A) Polymerase 100 Units $349.00



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