19 February 1988
Vol 239, Issue 4842

About The Cover

The backbone structure of human c-H-ras oncogene protein. The flow of the backbone is represented by a continuous ribbon using a program BSRIBBON. The guanosine diphosphate molecule is shown as a dot-surface using the program PSFRODO. See page 888. [A. M. de Vos et al., Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720]