Laccases Direct Ligni fi cation in the Discrete Secondary Cell Wall Domains of Protoxylem 1 [ W ] [ OPEN ]

Department of Botany (M.S., A.B., R.A.S., Y.W., A.L.S.) and Michael Smith Laboratories (A.B., R.A.S., B.E.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; Department of Biochemistry and United States Department of Energy Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin, Madison, Wisconsin 53703 (Y.T., J.R.); Nara Institute of Science and Technology, Nara 630–0192, Japan (T.D.); and Graduate School of Agriculture, Kyoto University, Kyoto 606–8502, Japan (Y.T.)