April 2001 issue
Cover illustration: Dimeric arrangement of human p73 sterile -motif related by a crystallographic twofold axis (p. 545). This figure was generated with bobscript [Esnouf, R. M. (1997). J. Mol. Graph. 15, 132-134] and rendered with Raster3D [Meritt, E. A. & Bacon, D. J. (1997). Methods Enzymol. 277, 505-524].