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Characterization of ucf‐eccDNA fragment junction sites. (A) As one example, [RBFOX1 circle 7,712,600‐7,712,978 bp] with 5 bp direct repeats (DR) flanking its start and end sites. (B) The nucleotide frequencies (palindromic repeats) surrounding the start and end sites of male‐derived ucf‐eccDNAs (pooled data from 19 cases) and female‐derived ucf‐eccDNAs (pooled data from 9 cases). Ucf‐eccDNAs: urinary cell‐free extrachromosomal circular deoxyribonucleic acid
