1. Departments of Biochemistry and Molecular Biology (J.A.W., N.F., C.B.),
2. Botany and Plant Pathology (J.T., T.G., O.M.d.I., J.B.O.), and
3. United States Department of Energy-Plant Research Laboratory (T.N.), Michigan State University, East Lansing, Michigan 48824; and
4. Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056 (J.G.J.)