EconoTaq DNA Polymerase, 5 U/µL, 1,000 U, Buffer with Mg++Dependable Taq polymerase performance. EconoTaq DNA Polymerase is provided with a choice of 10X Reaction Buffer with Mg++ (with Mg++); or 10X Reaction Buffer without Mg++ and a separate tube of 25 mM MgCl2 (separate Mg++). Product information QC specifications for EconoTaq DNA Polymerase are rigorous: Greater than 99% pure by SDS gel electrophoresis. No detectable DNA contamination as determined by PCR using generic primers. No detectable endonuclease