Polypurine reverse-Hoogsteen hairpin

Polypurine reverse-Hoogsteen hairpins (PPRHs) are non-modified oligonucleotides containing two polypurine domains, in a mirror repeat fashion, linked by a pentathymidine stretch forming double-stranded DNA stem-loop molecules. The two polypurine domains interact by intramolecular reverse-Hoogsteen bonds allowing the formation of this specific hairpin structure.

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