The study of methylene blue (MB) binding to DNA has been carried out by fluorescence spectroscopy method. It was shown that on the fluorescence spectra of MB and its complexes with DNA two peaks exist at λ=583 nm and λ=682 nm wavelengths. Peak at λ=583 nm enhances with increasing of DNA concentration, but at λ=682 nm it decreases. The comparison of obtained data with the results received for DN...

The force-displacement response of a single duplex DNA molecule was measured. The force saturates at a plateau around 70 piconewtons, which ends when the DNA has been stretched about 1.7 times its contour length. This behavior reveals a highly cooperative transition to a state here termed S-DNA. Addition of an intercalator suppresses this transition. Molecular modeling of the process also yield...

This is the first report of experimental observations of depletion interactions in solutions of a (hydrogen-bonded) reversible supramolecular polymer. Depletion forces were measured directly by colloidal probe atomic force microscopy. The range of the depletion force is consistent with existing independent experimental data. The interaction can be tuned by adding monofunctional chain stoppers t...

The supramolecular dimerization of tetraanionic corannulene is utilized as a self-assembly motif for the construction of highly charged, buckybowl-based supramolecular oligomers. Oligomers of up to 7 units (3900 g mol(-1)) of reduced dicorannulenic monomers are identified and characterized by various NMR techniques, and the reversibility of their assembly is established through the concentratio...

Polycystic kidney disease (PKD) is a genetic disorder characterized by aberrant renal epithelial cell proliferation and formation progressive growth of numerous fluid-filled cysts within the kidneys. Previously, we showed that there elevated Notch signaling compared to normal cells contributes cystic cells. Quinomycin A, bis-intercalator peptide, has previously been shown target pathway inhibit...