In some embodiments, the DNA polymerase comprises the amino acid sequence X1-X2-X3-X4-K-X5-X6-X7-X8-X9-X10-X11-X12-X13-X14-X15-X16 (SEQ ID NO:2); wherein X1-X9 and X11-X16 are any amino acid, and X10 is not T or A. In some embodiments, X1 is R or L; X3 is L, I, or Y; X5 is R or L; X6 is I or absent; X7 is G or absent; X8 is K, R, or Q; X9 is N, S, or G; X10 is any amino acid except T or A; X11 is