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CD spectra of (5′-GCCGGC-3′)2 (top left) and (5′-ACUGCAGU-3′)2 (top right) in 20% PEG 200 and standard (water) buffers at 25°C and of 5′-GCAUGC-3′ (bottom left) and 5′- ACUAUAGU-3′ (bottom right) in 20% PEG 200 and standard (water) buffers at 65°C.
