Table 2.

d_N, d_S and d_N/d_S

Codon type	Initial exon			Internal exon			Final exon
	dN	dS	dN/dS	dN	dS	dN/dS	dN	dS	dN/dS
CG containing codons in CGI	0.131	0.512	0.257	0.097	0.910	0.106	0.100	0.800	0.125
CG containing codons out of CGI	0.136	0.987	0.138	0.093	1.510	0.061	0.114	1.273	0.090
AG containing codons in CGI	0.146	0.485	0.302	0.101	0.644	0.157	0.109	0.599	0.181
AG containing codons out of CGI	0.134	0.508	0.264	0.087	0.535	0.164	0.112	0.533	0.210
GC containing codons in CGI	0.130	0.381	0.342	0.098	0.534	0.183	0.101	0.503	0.201
GC containing codons out of CGI	0.145	0.488	0.297	0.095	0.526	0.180	0.122	0.519	0.235
GA containing codons in CGI	0.120	0.381	0.314	0.084	0.531	0.159	0.091	0.463	0.197
GA containing codons out of CGI	0.114	0.450	0.252	0.075	0.489	0.154	0.096	0.479	0.200
All codons in CGIs	0.097	0.344	0.282	0.073	0.468	0.157	0.074	0.443	0.167
All codons out of CGIs	0.099	0.389	0.254	0.063	0.407	0.155	0.083	0.404	0.205

Rates were calculated separately for various gene elements and various classes of codons.