[Modified oligonucleotides containing 1-beta-D-galactopyranosylthymine: synthesis and substrate properties].

A convenient method of regioselective introduction of 1-β-D-galactopyranosylthymine into oligonucleotides was developed and the substrate properties of the modified oligonucleotides were investigated in the enzymatic reactions of formation and hydrolysis of internucleotide bonds.