We are grateful to Anne Arthur for editorial assistance.

We also thank

• Scott M. Le Grand of UCLA who developed the JAVA applet PDB3D
• Roman Laskowski, who partially optimized the SURFNET program for our purposes
• Andrew C.R. Martin for providing the ProFit program
• Pat Walters and Matt Stahl for the BABEL program
• Alla Gustchina from NCI Frederick
• Robert Lebherz; Manager of Computer Facilities, Advanced Biomedical Computing Center
  National Cancer Institute ,NCI-Frederick
• Chris van Buskirk from Johns Hopkins
• Manfred Hendlich from the original ReliBase
• Joel D. Sussman, Jaime Priluski and Enrique Abola from former PDB/Brookhaven
• Gary Gilliland and T.N.Bhat from NIST, PDB/RCSB; Gaithersburg
• Martin Lepsik from IOCB Prague
• James Cassatt and NIGMS for financial support

We acknowledge the National Cancer Institute for allocation of computing time and support staff at the Frederick Biomedical Supercomputing Center of the Frederick Cancer Research and Development Center. Research sponsored in part by the National Cancer Institute, DHHS, under contract with ABL, and by an interagency agreement with the National Institute of General Medical Sciences. The contents of this Web page do not necessarily reflect the views or policies of the Department of Health and Human Services, nor does mention of trade names, commercial products, or organizations imply endorsement by the U.S. Government or the Johns Hopkins University.

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