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Phylogenetic trees of clusters LTR_CE8 (a) and LTR_CE15 (b) in C. elegans. The elements LTR_CE8_chrV_rc_5190413 and LTR_CE8_chrV_rc_5179448 in tree (a) and LTR_CE15_chrV_2241535 and LTR_CE15_chrV_2238729 in tree (b), highlighted in rectangular boxes, are intact LTR retroelements identified by phylogenetic analysis.
