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Little is known about the origin and function of eukaryotic introns. Application of a novel linguistic approach to the analysis of intervening sequences reveals, however, that they exhibit a specific non-random vocabulary whose major feature is the utilization of mirror-symmetrical words ("mirrorrim"). Introns also manifest a significant tendency to avoid local complementarities. Possible biological implications of the corresponding loop regions in the RNA transcripts are discussed.
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Beckmann et al. (1986) studied this question.
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