From: Relative effects of mutability and selection on single nucleotide polymorphisms in transcribed regions of the human genome
Region
Size (nc)
A
C
G
T
CpG
5'UTR
7768
1770
2081
1938
1575
404
CDS*
64295
15454
14904
14492
17819
1626
Intronic
557915
150596
116032
121989
163818
5480
3'UTR
47900
13601
9850
9703
14266
480