NCIt definition : Non-coding, intervening sequences of DNA that are transcribed, but are removed from
within the primary gene transcript and rapidly degraded during maturation of messenger
RNA.;
Alternative definition : NCI-GLOSS: The sequence of DNA in between exons that is initially copied into RNA
but is cut out of the final RNA transcript and therefore does not change the amino
acid code. Some intronic sequences are known to affect gene expression.;