...will include the free nucleotide dGTP in the reaction (exclude all other nucleotides from standard polymerase...without ligation. Because of its dual polymerase/exonuclease functions, T4 DNA polymerase can create overhangs... which a single dNTP is included to stop the exonuclease function of the enzyme and shift its activity...polymerase protocol), causing the enzyme to perform exonuclease activity until the first "G" in the sequence.... the polymerase reaction is favored over the exonuclease reaction, the polymerase will add back the guanosine...manufacturer. It is very important to remove all free nucleotides from your PCR product before proceeding, as they... they will interfere with the exonuclease activity of T4 Pol in the following step. This may be accomplished...