however , it can be demonstrated 1 ) that single-stranded regions do not account for stable binding of proteins to native [ 5-aza-c ] dna and 2 ) that many nuclear proteins which form stable complexes with single-stranded dna are incapable of forming such complexes with double-stranded [ 5-aza-c ] dna .
C0012935
single-stranded dna
C0012854
dna