Poly(A) Polymerase catalyzes the incorporation of adenine residues into the 3'-termini of RNA. The enzyme uses single-stranded RNA as a primer. Poly(A) Polymerase is supplied in 25 mM Tris-HCl (pH 7.9), 500 mM NaCl, 1 mM EDTA, 0.1 mM DTT and 50% glycerol. Cat. # 2180B contains 5 of Cat. # 2180A. Please refer to Cat. # 2180A for complete product documentation and resources.