The rapid mixing synchrotron X-ray footprinting technique described in this article allows nucleic acid folding and ligand binding reactions to be followed on a millisecond time resolution with single nucleotide resolution. In principle, the change in ·OH protection of every nucleotide in a nucleic acid hundreds of nucleotides long can be monitored separately. In addition, a wide range of solution conditions are compatible with the radiolytic generation of ·OH. These characteristics of synchrotron X-ray footprinting create opportunities for conducting thermodynamic and kinetic studies of nucleic acids that are both comprehensive and detailed. Kinetic footprinting studies of a number of systems have been initiated by the Center for Synchrotron Biosciences using this technique.
Following the folding of RNA with time-resolved synchrotron X-ray footprinting. / Sclavi, Bianca; Woodson, Sarah; Sullivan, Michael; Chance, Mark; Brenowitz, Michael.In: Methods in enzymology, Vol. 295, 01.01.1998, p. 379-402.
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