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Medical Term:

Class I intron


introns characterized by a particular RNA secondary structure, based on four conserved nucleotides of 10–12 bases designated P,Q, R, and S. Most introns found in fungal mitochondrial genes belong to this class.

See Also: Class II intron

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.