1. Department of Chemistry and Biochemistry, Texas Tech University (W.D.N., Z.H.J.) Lubbock, Texas 79430
2. Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center (Y.O.L., J.C.H.), Lubbock, Texas 79430
3. Laboratoire de Chimie des Substances Végétales, University of Bordeaux I (S.Q.), Talence, France
4. Departments of Medicinal Chemistry (W.N.H.) University of Washington, Seattle, Washington 98195
5. Departments of Chemistry (T.R.P.), University of Washington, Seattle, Washington 98195
6. Departments of Zymogenetics (R.R.W.), Seattle, Washington 98195