Contents

02 February 2001
Vol 291, Issue 5505

About The Cover

Cover image expansion

COVER Bakers' yeast forms a large floral structure called a mat (~7.5 centimeters in diameter), which is made up of millions of yeast cells. The cells form these multicellular structures with a reproducible pattern when grown on the surface of semi-solid media. A cell surface glycoprotein, Flo11p, is required for mat formation and adherence to plastic. See page 878 [Photograph: F. Frankel]