| − | A '''CDNA library''' is a collection of [[DNA]] sequences generated from mRNA sequences. This type of library contains only protein-coding [[DNA]] (genes) and does not include any non-coding [[DNA]]. | + | A '''CDNA library''' is a collection of [[DNA]] sequences generated from mRNA sequences. This type of library contains only protein-coding [[DNA]] (genes) and does not include any non-coding [[DNA]] (also called an [[intron]]). |