<Tr> <Td_colspan="2"> DNA polymerase bound to a DNA octamer </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr> <Tr> <Th> Symbol </Th> <Td> Taq - exonuc </Td> </Tr> <Tr> <Th> Pfam </Th> <Td> PF09281 </Td> </Tr>

What is taq polymerase and why is it used in pcr