Plastids Contain a Second Sec Translocase System with

, Kenneth Cline, and Donna E. Fernandez*Department of Botany, University of Wisconsin, Madison, Wisconsin 53706–1381 (C.A.S., J.H.H., J.J.B., B.J.A.,G.R.H., D.E.F.); and Horticultural Sciences Department and Plant Molecular and Cellular Biology, Universityof Florida, Gainesville, Florida 32611 (J.R.M., K.C.)