|MadSci Network: Genetics|
In contrast to bacteria which have no introns, eukaryotes (cells with a nucleus) have introns which are intervening sequences within genes which get spliced out when genes are transcribed and are not expressed in the protein. In contrast, exons are the sequences within a gene which do get expressed and translated into protein. Intergenic DNA, as the name suggests, is DNA between genes which does not code for proteins. Hope this helps gabriel vargas md/phd References Genes VII by Benjamin Lewin
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