in which exons on different pre-mRNAs are ligated together. The existence of introns and differential splicing helps explain how new genes are created during evolution. Splicing makes genes more ...

Exons can be separated by intervening sections of DNA that do not code for proteins, known as introns. Following transcription, new, immature strands of messenger RNA, called pre-mRNA, may contain ...

The beads represent the exons, the segments of a DNA molecule containing the information coding for the protein of interest. The string between beads represents introns, DNA segments separating ...