Table 1.

Mean numbers of nucleotide substitutions per 100 sites (d ± SEM), per 100 synonymous sites (d_S ± SEM), and per 100 nonsynonymous sites (d_N ± SEM) in pairwise comparisons of MHC class I alleles from Callitrichinae and non-Callitrichinae New World primates

	d	dS	dN
Within-species comparisons
Callitrichinae
S. oedipus	4.1  ±  0.3	4.4  ±  0.7	4.0  ±  0.4
S. fuscicollis	4.6  ±  0.5	5.3  ±  1.1	4.4  ±  0.6
C. jacchus	5.6  ±  0.5*	7.3  ±  1.2	5.0  ±  0.5
Non-Callitrichinae
A. trivirgatus	8.3  ±  0.8†	11.4  ±  1.9†	7.4  ±  0.9†
P. pithecia	8.7  ±  0.6†	10.1  ±  1.4†	8.3  ±  0.7†
A. belzebuth	12.5  ±  0.8†	17.2  ±  2.0†	11.0  ±  0.9†
Between-species comparisons
Callitrichinae
S. oedipus vs. S.   fuscicollis	4.8  ±  0.3	5.4  ±  0.7	4.7  ±  0.4
S. oedipus vs. C.   jacchus	6.2  ±  0.5‡	8.4  ±  1.2	5.6  ±  0.5
S. fuscicollis vs. C.   jacchus	6.4  ±  0.5§	9.0  ±  1.2	5.6  ±  0.5
Non-Callitrichinae
A. trivirgatus vs. P.   pithecia	10.5  ±  0.6§	12.3  ±  1.2§	9.9  ±  0.7§
A. trivirgatus vs. A.   belzebuth	10.7  ±  0.6§	14.5  ±  1.4§	9.5  ±  0.7§
A. pithecia vs. A.   belzebuth	11.0  ±  0.6§	14.4  ±  1.4§	10.0  ±  0.6§

Test of the hypothesis that values of d, d_S, or d_N for within-species comparisons equal corresponding values for S. oedipus: *P < 0.05;  

^†P < 0.001. Test of the hypothesis that values of d, d_S, or d_N for between-species comparisons equal corresponding values for S. oedipus. vs. S. fuscicollis:  

^‡P < 0.01;  

^§P < 0.001.