Table 1.

Percentage of GC-composition in different regions of pre-mRNA for diverse animal species.

SPECIES	% GC-content
	5'-UTRs	CDS	3'-UTRs	Introns
Human	60%	52%	44%	41%
Mouse	59	52	44	43
Cow	60	54	44	43
Chicken	57	51	41	41
Zebrafish	45	50	37	35
Drosophila	45	54	36	40