Introns and Exons
The introns are removed, and the exons are joined to together to form the final functional messenger RNA.
We have referred to the introns as "redundant code." However, although they are not used to produce the amino acid sequence, this may be a misleading description. In fact their function is largely unknown. Although they are a feature of all eurkaryotic organisms, and may differ considerably in the same gene in different species, often they are remarkably similar. That is to say, they have been conserved through evolution. One suggestion is they have a role in the regulation of gene expression.
Bland.J., (2003) About Gender: Introns and Exons
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Web page copyright 1998-2006 Derby TV/TS Group. Text copyright Jed Bland.
Last amended 12.08.03