Modified Thermococcus polymerases

A method of extending a primer, said method comprising contacting a primer hybridized to a template polynucleotide with a nucleotide and extending said primer with a polymerase by incorporating the modified nucleotide to form an extended primer, wherein the polymerase comprises an amino acid sequence that is at least 90% identical to SEQ ID NO:

• 1;
• and further comprises:
• an alanine at amino acid position 411 or an amino acid functionally equivalent to amino acid position 411;
• a glycine at amino acid position 412 or an amino acid functionally equivalent to amino acid position 412;
• and
• a proline at amino acid position 413 or an amino acid functionally equivalent to amino acid position 413;
• and
• an alanine or glycine at amino acid position 93 or an amino acid functionally equivalent to amino acid position 93.