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Describes a method of constructing conformational models of flexible complex polysaccharides on the basis of nuclear magnetic resonance data and molecular modeling. Application of the method to a polysaccharide which is a lectin-biding receptor important in coaggregation of oral bacteria; Measurements of coupling constants for a 13C-enriched bacterial polysaccharide.

Studies the dynamics of the motion of a complex polysaccharide having seven sugar residues in the repeating subunit and which is a receptor for lectin interaction in the coaggregation of oral bacteria. Measurements of the longitudinal and the rotating frame relaxation rates; Dynamics of a flexible polysaccharide.

Investigates the involvement of univalent cations in stabilizing G-quartet structures of the oligonucleotide d(T2G4T). Synthesizing of oligonucleotide; Nuclear magnetic resonance measurements; Smear of electron density; Types of binding environments for univalent cations; NMR behaviors of 23Na+ and 39K+; Potassium; Resonances of amino protons.

Examines assumptions about duplex DNA structure. Sensitivity to ionic conditions; Binding of simple cations to DNA in a nonspecific fashion; Experimental procedures; Oligonucleotides; Quadrupole coupling constants.