Image Number D1244-1

Chemist Charles Lee inspects a petri dish containing xylan, a component of the hemicellulose in plant cell walls. Bacteria that produce xylanase were streaked onto the dish in a wavy pattern, and the clear areas are where the xylanase is degrading the xylan.

Photo by Peggy Greb.

640 pixels wide: (d1244-1.jpg)