单词	intron
释义	intron /ˈɪntrɒn / noun Biochemistry A segment of a DNA or RNA molecule which does not code for proteins and interrupts the sequence of genes. Compare with exon1.First, many heterochromatic genes have large introns relative to the genome as a whole.... The coding region is interrupted by several synthetic introns to improve gene expression. This finding is the first suggestion that multiple spliceosomal introns occur in ribosomal genes. Derivatives intronic adjective ... The upper band is amplified genomic DNA containing the intronic sequence. Even though there was a certain amount of intra-allelic variation in intronic and third codon positions, an allele-specific DNA consensus sequence could be easily deduced. In the GART locus, however, simultaneous transcription of the purine gene and the intronic gene seems possible. Origin 1970s: from intra- 'within' + -on.
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