poly[d(TCC)].poly[d(GGA)]
poly[d(tcc)].poly[d(gga)]
A double-stranded DNA polynucleotide comprising in one strand a repeating sequence of one thymidine residue and and two deoxycytidine residues, with in a complementary strand a repeating sequence of two deoxyguanosine residues and one deoxyadenosine residue, all residues in each strand being connected by 3'→5' phosphodiester linkages.