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The repetitive sequence PisTR-A has an unusual organization in the pea (Pisum sativum) genome, being present both as short dispersed repeats as well as long arrays of tandemly arranged satellite DNA. Cloning, sequencing and FISH analysis of both PisTR-A variants revealed that the former occurs in the genome embedded within the sequence of Ty3/gypsy-like Ogre elements, whereas the latter forms homogenized...
Ogre elements are a group of LTR retrotransposons recently discovered in legume plants, where they constitute almost 40% of the genome in some species. They are exceptional in their size (reaching 25 kb) and possess several specific features, including an intron within a polyprotein-coding region, and an extra open reading frame (ORF1) encoding a protein of unknown function located upstream of the...
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