What is an intron?
An intron is any nucleotide sequence in a certain gene that can be removed before the translation of the messenger RNA (mRNA). Introns, which are situated between exons, do not function for protein coding in the protein synthesis and apparently interrupts a gene-coding or non-translated sequences.
After the transcription of particular genes to the mRNA, the introns are removes and the exons are spliced with enzymes and will be further translated into amino acids and proteins. Recent researches however found out that some introns can be encoded to generate non-encoding RNA molecules.