1. Centre de Recherches sur les Macromolécules Végétales-Centre National de la Recherche Scientifique, BP 53, 38041 Grenoble cedex 9, France (affiliated with the Joseph Fourier University, Grenoble; C.V.-R., A.H., H.D., Y.L.)
2. Department of Biochemistry, Universidad Federal do Paranã, BP 19046, 81531–970, Curitiba, Paranã, Brazil (F.R.)
3. Department of Chemistry, Universidad Federal do Paranã, BP 19081, 81531–990, Curitiba, Paranã, Brazil (M.R.S.)