A simple model for metal cation-phosphate interactions in nucleic acids in the gas phase: Alkali metal cations and trimethyl phosphate

IRMPD action spectroscopy of alkali metal cation-cytosine complexes: effects of alkali metal cation size on gas phase conformation.

The gas-phase structures of alkali metal cation-cytosine complexes generated by electrospray ionization are probed via infrared multiple photon dissociation (IRMPD) action spectroscopy and theoretical calculations. IRMPD action spectra of five alkali metal cation-cytosine complexes exhibit both similar and distinctive spectral features over the range of ~1000-1900 cm(-1). The IRMPD spectra of t...

Discrimination between Alkali Metal Cations

K+ is a competitive inhibitor of the uptake of the other alkali metal cations by yeast. Rb+ is a competitive inhibitor of K+ uptake, but Li+, Na+, and Cs+ act like H+. At relatively low concentrations they behave as apparent noncompetitive inhibitors of K+ transport, but the inhibition is incomplete. At higher concentrations they inhibit the remaining K+ transport competitively. Ca++ and Mg++ i...

Alkali metal cation binding affinities of cytosine in the gas phase: revisited.

Binding of metal cations to the nucleobases can influence base pairing, base stacking and nucleobase tautomerism. Gas-phase condensation of dc discharge generated alkali metal cations and thermally vaporized cytosine (DC/FT) has been found to produce kinetically trapped excited tautomeric conformations of the M(+)(cytosine) complexes, which influences the threshold collision-induced dissociatio...

Discrimination between Alkali Metal Cations by Yeast

K(+) is a competitive inhibitor of the uptake of the other alkali metal cations by yeast. Rb(+) is a competitive inhibitor of K(+) uptake, but Li(+), Na(+), and Cs(+) act like H(+). At relatively low concentrations they behave as apparent noncompetitive inhibitors of K(+) transport, but the inhibition is incomplete. At higher concentrations they inhibit the remaining K(+) transport competitivel...

Metal/Nucleic-Acid Interactions