It's not DNA, it's collagen and although that might seem picky...

Heheh. Masterly understatement there, Jack. I was once having a cup o'char in the prep room behind the lab from which I could hear the head of science telling his top year 11 biology group that chlorophyll was a protein. After he'd finished I informed him that he was in error telling them that. After arguing fruitlessly that he had been right, he conceded, but claimed he'd had to tell them that in order to keep it simple, that it was a half-truth he'd used to get a difficult point across. :-)