Description: A truncated fragment of DNA polymerase I that lacks the 5' to 3' exonuclease activity of the full length enzyme. The enzyme is well suited for use in 3'-end labelling of DNA fragments for sequence analysis, for the conversion of 5'-extended ends to flush ends for cloning, for second-strand synthesis of cDNA and for random primer labelling of DNA fragments.
Storage conditions: 50 mM potassium phosphate, pH 7.0, 1.0 mM DTT, 50% (v/v) glycerol. Store at -20 °C.
Concentration: 5 U/µl.
10x reaction buffer: 500 mM Tris-HCl, pH 7.5, 100 mM MgCl2, 10 mM DTT, 500 µg/ml BSA.