The molecule is a double-stranded DNA polynucleotide consisting of in one strand a repeating unit of thymidine and deoxycytidine residues, with in a complementary strand a repeating unit of deoxyguanosine and deoxyadenosine residues, all residues in each strand beiing connected by 3'->5' phosphodiester linkages. It contains a poly[d(GA)] and a poly[d(TC)].
[(2R,3S,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-2-(phosphonooxymethyl)oxolan-3-yl] [(2R,3S,5R)-5-(6-aminopurin-9-yl)-3-hydroxyoxolan-2-yl]methyl hydrogen phosphate;[(2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-3-hydroxyoxolan-2-yl]methyl [(2R,3S,5R)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)-2-(phosphonooxymethyl)oxolan-3-yl] hydrogen phosphate