AUTHOR CORRECTION
Volume 88, no. 15, p. 8514–8527, 2014. Page 8516, Materials and Methods, “Mismatched primer extension assays,” last two lines of the paragraph: “dissociation constant (KD) for dNTP and Mg2+ was assumed to be the same as that of ATP (KD = 8.9 × 10−6 M)” should read “dissociation constant (KD) for dNTP and Mg2+ was assumed to be the same as that of ATP (KD = 89.1 × 10−6 M) (75).”
All calculations of free Mg2+ in the original article were made correctly using the KD value of 89.1 × 10−6 M, but the value was incorrectly stated in the original article as 8.9 × 10−6 M due to a typographical error. Because the correct value was used in calculation, this did not affect the original data, data interpretation, and conclusions of this study.