Characteristic
Average
Number of exons
8.8
Size of internal exon
145 bp
Size of intron
3,365 bp
Size of 5′ untranslated region
300 bp
Size of 3′ untranslated region
770 bp
Size of coding region
1,340 bp
Total length of gene
27,000 bp
Table 20.5:
Average characteristics of genes in the human genome