From: Evolution of alternative and constitutive regions of mammalian 5'UTRs
 | Human | Mouse | ||
---|---|---|---|---|
 | nonALT | ALT | nonALT | ALT |
Total genes | 11,727 | 2,915 | 14,288 | 909 |
5'UTR length | 203 | 239.6 | 180.1 | 178.1 |
Genes with uORFs | 5212 (44%) | 1547 (53%) | 5968 (42%) | 460 (51%) |
uORF length | 58.7 | 73.4 (ALT) | 54.1 | 63.1 (ALT) |
 |  | 48.2 (CONSTIT) |  | 44 (CONSTIT) |