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| Noncoding regions common in eukaryotic genes but are rare in bacterial genes. Present in mitochondrial and chloroplast genes as well as nuclear genes of eukaryotes. The size and number are directly related to increasing organismal complexity. |
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Definition
| coding region of a split gene. |
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| found in some rRNA genes, are self-splicing: they can catalyze their own removal. self-splicing. |
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| present in some protein-encoding genes of mitochondria, chloroplasts, and a few eubacteria; they also are self-splicing, but differs from group I introns. |
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Definition
| introns located in the protein-encoding genes of the eukaryotic nucleus. The splicing mechanism is similar to group II introns, but they are not self-splicing; their removal requires snRNAs and an umber of proteins. Splicesomal |
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Definition
| found in tRNA genes, utilize yet another splicing mechanism that relies on enzymes to cut and reseal the RNA. Enzymatic |
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