Table 1.

Proportion of Neighboring Nucleotides

Position (bp)a	5′ side				3′ side				Both sides
A (%)	C (%)	G (%)	T (%)	A (%)	C (%)	G (%)	T (%)	A (%)	C (%)	G (%)	T (%)
1	30.98	25.35	18.76	24.92	25.11	18.85	25.51	30.53	28.04	22.10	22.13	27.72
2	28.51	23.05	20.29	28.15	28.33	20.24	22.97	28.46	28.42	21.65	21.63	28.30
3	29.39	21.14	19.99	29.48	29.62	20.03	21.04	29.30	29.51	20.58	20.52	29.39
4	29.94	21.22	20.39	28.45	28.64	20.39	21.20	29.77	29.29	20.81	20.79	29.11
5	29.64	20.91	20.71	28.75	28.92	20.70	20.80	29.57	29.28	20.80	20.76	29.16
6	29.33	20.53	21.44	28.70	28.87	21.40	20.56	29.17	29.10	20.96	21.00	28.94
7	29.66	20.14	20.92	29.28	29.38	20.98	20.16	29.48	29.52	20.56	20.54	29.38
8	29.77	20.43	21.07	28.73	28.97	21.03	20.41	29.59	29.37	20.73	20.74	29.16
9	29.16	20.82	20.79	29.23	29.36	20.81	20.79	29.04	29.26	20.82	20.79	29.14
10	29.06	20.73	20.95	29.26	29.41	20.94	20.69	28.95	29.24	20.84	20.82	29.11
11–20	29.36	20.70	20.84	29.10	29.31	20.83	20.66	29.20	29.34	20.77	20.75	29.15
21–50	29.20	20.92	20.82	29.06	29.25	20.83	20.88	29.05	29.21	20.89	20.86	29.04
51–100	29.32	20.69	20.73	29.26	29.39	20.78	20.66	29.17	29.32	20.76	20.72	29.19
101–200	29.41	20.65	20.65	29.30	29.41	20.71	20.64	29.24	29.32	20.76	20.73	29.18
201–300	29.61	20.37	20.38	29.63	29.68	20.52	20.44	29.36	29.48	20.63	20.60	29.29
Genomeb	29.55	20.44	20.46	29.54	29.55	20.44	20.46	29.54	29.55	20.44	20.46	29.54

^aPosition relative to the polymorphic site. For positions farther than 10 bp, the average proportion of each nucleotide in the range is shown. 

^bThe average proportion of four nucleotides in the human genome based on NCBI Human RefSeq.