Exon / Intron structure of a large eukaryotic gene

    The transcribed gene region for the structural protein Dystrophin extends over a distance of ~ 2.5 million base pairs (2.5 Mbp), and includes several dozen exons [dark green boxes]. The introns [light green boxes] occupy > 90% of the gene region: some of these intervening sequences are more than 200,000 bp (200 Kbp) in length.

Figure ©2002 by Griffiths et al.; All text material ©2010  by Steven M. Carr