exon

…and adjacent coding regions called exons. The intron is twisted into a loop and excised, and the exons are linked together. The resulting capped, tailed, and intron-free molecule is now mature mRNA.

…coding for protein are called exons, and the noncoding regions separating the exons are called introns. Following transcription, these coding sequences must be joined together before the mRNAs can function. The process of removal of the introns and subsequent rejoining of the exons is called RNA splicing. Each intron is…

The coding segments are called exons; the noncoding ones are called introns. A research team working under Sharp at the Massachusetts Institute of Technology produced the same finding that same year. Previously, based on studies of bacterial DNA, biologists believed that genes consisted of unbroken stretches of DNA, all of…

…coded for proteins, now called exons, were separated by long stretches of DNA, now called introns, that did not contain genetic information. At the same time, a team working independently under Roberts came up with the same finding. Previously biologists had believed that genes were continuous stretches of DNA that…