It seems you are mistaking DNA's quaternary structure for its tertiary structure. DNA's tertiary structure remains helical while wound up in chromatin. http://

It seems you are mistaking DNA's quaternary structure for its tertiary structure. DNA's tertiary structure remains helical while wound up in chromatin. http://upload.wikimedia.org/wikipedia/commons/d/db/Nucleosome_1KX5_2.png http://upload.wikimedia.org/wikipedia/commons/d/db/Nucleosom... http://en.wikipedia.org/wiki/Nucleic_acid_structure http://en.wikipedia.org/wiki/Nucleic_acid_structure