Signal sequences in intron equivalents
The 5'
and 3' ends of each intron are marked with GU
and AG dinucleotide sequences; a
short tract of poly-pyrimidines (C or T)
also occurs near the 3' end ahead of the AG
signal.
[Note: exons and introns
occur in the DNA sequence as expressed
and intervening sequences: hnRNA products
transcribed off the DNA template strand include exon
and intron equivalents. ]
Figure © 2012 TA Brown, Introduction
to Genetics (1st ed.); additional
text © 2024 by Steven M. Carr