Klenow Fragment is the large fragment of DNA polymerase I. It exhibits 5→3 polymerase activity and 3→5 exonuclease (proofreading) activity, but lacks 5→3 exonuclease activity of DNA polymerase I.
DNA blunting by fill-in 5-overhangs Random-primed DNA labeling Labeling by fill-in 5-overhangs of dsDNA
Unit definition | Unit One unit of the enzyme catalyzes the incorporation of 10nmol of deoxyribonucleotides into a polynucleotide fraction (adsorbed on DE-81) in 30minutes at 37°C, using poly(dA-dT)·poly(dA-dT) as a template·primer. |
Source | E.coli cells with a cloned fragment of the polA gene |
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