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The [Mg2+] dependence of the excess number of the different types of the dehydrated (or hydrated) Mg2+ ions: (A) 40 bp A-RNA duplex with 10mM Na+, (B) 40 bp B-DNA duplex with 5 mM Na+, (C) adenine riboswitch with 50 mM K+, (D) rRNA-protein complex with 60 mM K+, and tRNA with (E) 10 mM Na+ and (F) 32 mM Na+.
