Interaction of cyclic cytosine-, guanine-, thymine-, uracil- and mixed guanine-cytosine base tetrads with K+, Na+ and Li+ ions -- a density functional study.

Interaction of cyclic cytosine-, guanine-, thymine-, uracil- and mixed guanine-cytosine base tetrads with K+, Na+ and Li+ ions -- a density functional study.