brominated poly[d(GC)]
brominated poly[d(gc)]
A single-stranded DNA polynucleotide consisting of a repeating unit of brominated deoxyguanosine and deoxycytidine residues, with all residues connected by 3'→5' phosphodiester linkages.  The sites of bromination are at C-8 of guanine and C-5 of cytosine, although not all these sites are brominated, with bromination at the guanine C-8 predominating.