Contents

12 March 1999
Vol 283, Issue 5408

About The Cover

Cover image expansion

COVER Optical images of single molecules. Clockwise from upper left. Frequency-space: pentacene in p-terphenyl at 2 kelvin (K). Confocal: protein kinase A regulatory subunit in agarose gel, 295 K (room temperature). Total internal reflection: green fluorescent protein in polyacrylamide gel, 295 K. Far-field epifluorescence: terrylene in p-terphenyl, 2 K. Special section topics begin on p.1667.[Images: W. E. Moerner, W. P. Ambrose, S. Brasselet, J. Deich, R. M. Dickson, D. J. Norris, S. S. Taylor]