the evaluation of the electrostatic molecular potential at important nucleophilic sites of the purine and pyrimidine bases in poly ( dg.dc ) and poly ( da.dt ) and of the evolution of the potential through the series free bases-nucleosides-nucleotides-single polynucleotide helices-double helices enables the interpretation of the evolution of the corresponding reactivity of the bases towards a series of electrophilic carcinogenic and mutagenic reactants .
C0028630
nucleotides
C0032550
polynucleotide