Cellular Contortionist | Science News

Support Science Journalism

Science News is a nonprofit.

Support us by subscribing now.


Feature

Cellular Contortionist

Can DNA easily get bent out of shape?

By
10:10am, January 9, 2007

Even when biophysicist Paul Wiggins pursues his favorite sport, rock climbing, he doesn't leave his work behind. While struggling to untangle ropes—"one of the most frustrating aspects of climbing," he says—Wiggins envisions great lengths of DNA tangled inside cells. The mechanical properties, particularly the flexibility, of that biomolecule fascinate him.

In cells, random thermal motion makes DNA and other long biomolecules wriggle. Experimenters have observed that the distance between bends in DNA tends to be around 50 nanometers. The stiffness of stretches short

This article is only available to Science News subscribers. Already a subscriber? Log in now.
Or subscribe today for full access.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content