Table 2.

Average GC content and the variance among alignments exceeding 40 bp for each species and each functional category. Variance is standardized to the variance observed in the human sequence.

	Mean GC content			Variance GC content
Type of sequence	Human	Mouse	Pig	Human	Mouse	Pig
Intron	0.390	0.413	0.407	1	0.82	1.02
Coding	0.487	0.500	0.496	1	0.69	1.01
3' UTR	0.404	0.426	0.418	1	0.77	1.03
5' UTR	0.595	0.593	0.592	1	0.81	0.92
Intergenic	0.384	0.399	0.396	1	0.91	1.01