Marine DNA polymerase I

An isolated DNA polymerase, wherein said DNA polymerase is the amino acid sequence selected from the group consisting of SEQ ID NOs:

• 3, 4, 5, 6, 7, and 8, or is at least 98% identical to the amino acid sequence selected from the group consisting of SEQ ID NOs:
• 3, 4, 5, 6, 7, and 8, wherein
• the amino acid in position 450 of SEQ ID NO:
• 3 is Asp,
• the amino acids in positions 449 and 451 of SEQ ID NO:
• 4 are Ala,
• the amino acids in positions 449 and 450 of SEQ ID NO:
• 5 are Ala and Asp, respectively,
• the amino acids in positions 450 and 451 of SEQ ID NO:
• 6 are Asp and Ala, respectively,
• the amino acids in positions 449, 450 and 451 of SEQ ID NO:
• 7 are Ala, Asp and Ala, respectively, and
• the amino acid in position 521 of SEQ ID NO:
• 8 is Ala
• wherein the DNA polymerase which is at least 98% identical to the amino acid sequence selected from the group consisting of SEQ ID NOs:
• 3 4, 5, 6, 7 and 8 only contains conservative amino acid substitutions;
• and
• wherein said DNA polymerase has no strand displacement activity.