Isotope-edited variable temperature infrared spectroscopy for measuring transition temperatures of single A-T Watson-Crick base pairs in DNA duplexes
Hao-Che Peng,
Shrijaa Mohan,
Muhammad T. Huq
et al.
Abstract:Experimental methods to determine transition temperatures for individual base pair melting events in DNA duplexes are lacking despite intense interest in these thermodynamic parameters. Here, we determine the dimensions of the thymine (T) C2=O stretching vibration when it is within the DNA duplex via iso-topic substitutions at other atomic positions in the structure. After determining that this IR difference probe was localized enough to measure sub-molecular scale structures in high molecular weight complexes… Show more
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