Table 3.

Proportion of Random Sequences with K_A/K_S Significantly Smaller than 1 (P < 0.05)^a

% Divergence	Length (codons/nucleotides)
17/5	34/102	50/150	67/201	100/300	334/1002
5	3.0 (2.0–4.1)	2.2 (1.3–3.1)	2.5 (1.5–3.5)	2.5 (1.5–3.5)	2.0 (1.1–2.9)	2.2 (1.3–3.1)
10	2.9 (1.9–3.9)	2.8 (1.8–3.8)	2.6 (1.6–3.6)	1.8 (1.0–2.6)	2.2 (1.3–3.1)	1.9 (1.1–2.7)
15	5.0 (3.6–6.4)	3.3 (2.2–4.4)	1.7 (0.9–2.5)	2.1 (1.2–3.0)	3.5 (2.4–4.6)	1.9 (1.1–2.7)
20	4.8 (3.5–6.1)	2.9 (1.5–3.5)	2.9 (1.9–3.9)	2.5 (1.5–3.5)	2.5 (1.5–3.5)	1.1 (0.5–1.7)

^aThe values in parentheses indicate the 95% confidence interval.