Contents

24 September 1999
Vol 285, Issue 5436

About The Cover

Cover image expansion

COVER (Upper left) X-ray crystal structure of the Thermus thermophilus 70S ribosome at 7.8 Å resolution. Transfer RNAs (green, blue, and red) bound to the aminoacyl, peptidyl, and exit sites, respectively, occupy the cavity between the 30S (light blue) and 50S (gray) ribosomal subunits. (Lower right) The two ribosomal subunits are moved apart to show the relative orientations of the three transfer RNAs. See page 2095 [Image: J. H. Cate, M. M. Yusupov, G. Zh. Yusupova, T. N. Earnest, H. F. Noller]