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CD spectroscopy. CD spectra of 417-bp DNA-like polymers (pJ1741) in 10 mM phosphate buffer, pH 7.0, containing 1 M NaCl showing ellipticity (Θ) as a function of wavelength (λ) were divided into four groups based on HDR [HDR = Θ(λ290)/Θ(λ201)] in the ranges 0 < HDR < 0.5 (A), −0.5 < HDR < 0 (B), −1.5 < HDR < −0.5 (C) and 0.5 < HDR < 1.5 (D).
