Table 2.

Student's t-tests between 3 groups of mismatch positions for each mismatch type.

Mismatch type	Center vs. 5'-end	Center vs. 3'-end	5'-end vs. 3'-end	Frequency
A-C	0.00187	0.000128	0.525*	673
A-G	6.29E-05	6.78E-10	0.0423	2567
A-T	2.78E-08	8.31E-10	0.747*	553
T-A	0.0821*	0.00499	0.328*	506
T-C	0.00733	0.047	0.461*	2920
T-G	0.553*	0.185*	0.422*	435
C-A	0.187*	2.54E-09	1.89E-06	778
C-G	0.000115	3.10E-06	0.377*	627
C-T	1.47E-14	2.13E-46	1.66E-12	2874
G-A	2.17E-06	8.23E-19	6.08E-05	2624
G-C	0.00103	2.76E-05	0.339*	687
G-T	0.0126	5.62E-05	0.103*	556

*: p value ≥ 0.05