in the present work , characterization , specificity and structure of binary polychelates ( pigment-metal ) n and ternary complexes ( pigment-metal-nucleic acids ) are successively reported : whereas , unspecific complex ii with double-stranded polynucleotides is shown to result from simple adsorption of polychelate onto the double helix , complex i is specific for single-stranded dna ( or polypurine nucleotides ) and results from electrostatic association of separate pigment-metal units with the polyphosphate chain .
C0032550
polynucleotides
C0028630
nucleotides