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Intron Definition. An intron is a long stretch of noncoding DNA found between exons (or coding regions) in a gene. Genes that contain introns are known as discontinuous or split genes as the coding regions are not continuous. Introns are found only in eukaryotic organisms.
An intron is any nucleotide sequence within a gene that is not expressed or operative in the final RNA product. The word intron is derived from the term intragenic region, i.e., a region inside a gene. [1] The term intron refers to both the DNA sequence within a gene and the corresponding RNA sequence in RNA transcripts. [2]
Introns are non-coding sections of an RNA transcript, or the DNA encoding it, which are spliced out, or removed, before the RNA molecule is translated into a protein.
Origin of Introns. Types of Introns. Intron Structure. Intron Function. References. What is Intron? Introns are sequences that exist between two exons in eukaryotes. They do not code for proteins directly. They are eliminated prior to mRNA translation into proteins. Therefore, these introns are subjected to splicing.
What are Introns? Introns are non-coding regions in DNA found between exons in a gene. Introns in genes do not code for amino acids. In cells, a portion of the gene sequence that is not expressed for proteins is called introns. In eukaryotic hnRNA introns are common, but in prokaryotes, they are present in tRNA and rRNA.