Abstract
Oligonucleotide analogs with L- and D-lysine residues incorporated in internucleotide linkages were synthesized and their affinity toward complementary DNA was studied. Stability of the duplexes formed by the modified oligonucleotides and their wild-type complements appeared to be close to that of the isosequential unmodified duplex, oligonucleotides carrying D-lysine residues forming generally more stable duplexes than L-lysine derivatives.
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