200D:
reference: Stable loop in the crystal structure of the intercalated four-stranded cytosine-rich metazoan telomere., Kang C, Berger I, Lockshin C, Ratliff R, Moyzis R, Rich A, Proc Natl Acad Sci U S A 1995 Apr 25;92(9):3874-8. PMID: 7731999

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