Zeolite 5A showing gas sorption simulation results (center, courtesy of Molecular Simulation Inc., Burlington, MA) and clockwise from upper left, a crystal of a fragment of 5S rRNA (Courtesy of Christian Betzel, EMBL, Hamburg), DNA repair enzyme endonuclease III and its DNA binding surface (courtesy of John Tainer, Scripps Research Inst.), a complex of the SH2 domain of the v-src oncogene product and a phosphotyrosyl peptide (courtesy of John Kuriyan, Howard Hughes Medical Inst., Rockefeller University) and a Laue pattern of the enzyme thymidine phosphorylase produced at the Cornell High Energy Synchrotron Source (courtesy of S. Ealick).