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Active, Three Prime Repair Exonuclease 1 (TREX1) enzyme, His-tagged protein expressed and purified from Baculovirus-infected insect cells. The enzyme has been thoroughly validated with Transcreener dAMP Exonuclease Activity Assays. For specific activity, please refer to the Certificate of Analysis for each individual enzyme lot. Purity is >90% in a 50 mM Tris-HCl pH 8.0, 500 mM NaCl, and 20% glycerol buffer composition. This product has 100 µg TREX1 enzyme by estimated weight.