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TM dependence on salt concentration for duplexes in 10 mM sodium phosphate buffer (pH 7), ∼7 μM strand concentration for (a) DD (filled circle) and DD-1 (filled square); ∼5 μM strand concentration for (b) DDD (filled circle) and DDD-1 (filled square); ∼7 μM strand concentration for (c) HPL (filled circle) and HPL-1 (filled square).
