1. Department of Plant Biology (M.T.J., R.R.D., B.D., Y.S.-H.) and
2. Plant Research Laboratory (M.T.J., B.F.L., D.M.K.), Michigan State University, East Lansing, Michigan 48824;
3. Institute of Biological Chemistry, Washington State University, Pullman, Washington 99164 (J.-J.P., M.G., D.R.G.);
4. Donald Danforth Plant Science Center, St. Louis, Missouri 63132 (H.W., L.M.H.);
5. National Center of Biomedical Analysis, Beijing 100850, China (H.W.);
6. College of Agricultural, Consumer, and Environmental Sciences, New Mexico State University, Las Cruces, New Mexico 88003 (F.O.H., T.S.);
7. Department of Physiology, Cambridge Advanced Imaging Centre, Cambridge CB2 3DY, United Kingdom (J.N.S.); and
8. Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599 (L.M.H.)