This work has been supported in part by funds granted by the Division of Natural Sciences of the University of California, Santa Cruz. Jon Becher and Maspar Corporation generously provided time on several Maspar computers. Anders Krogh's help in understanding the protein code was invaluable. Charlie McDowell ported the code to C-Linda. Anne Urban implemented the inner loop on the CM-2; CM-2 time was generously provided by Thinking Machines Corporation and the Brown University Department of Computer Science. Cray time was provided by the San Diego Supercomputer Center. Saira Mian identified the elongation factors for study and provided biological insight into their analysis.