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  • Title: Cytochrome Oxidase Subunit II Gene from Carrot Contains an Intron.
    Author: Turano FJ, Debonte LR, Wilson KG, Matthews BF.
    Journal: Plant Physiol; 1987 Aug; 84(4):1074-9. PubMed ID: 16665564.
    Abstract:
    Introns in the cytochrome oxidase subunit II (COXII) gene of plant mitochondrial DNA (mtDNA) have been observed only in monocots. The COXII genes in dicots investigated to date do not contain introns. This is the first report of an intron in the COXII gene of a dicot. The presence of an intron in the carrot COXII intron was verified by restriction mapping and hybridization using specific maize and wheat COXII probes. Regions of the carrot COXII intron are homologous to the maize COXII intron and homologous to the wheat COXII intron-insert as demonstrated by hybridization. Homology of these regions was confirmed by sequencing portions of the gene. A comparison of the restriction map of the carrot COXII gene with the restriction maps of the COXII genes from pea, Oenothera, maize, wheat, and rice revealed that the carrot map coincides with the rice restriction map.
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