[1] Univ Seville, Dept Genet, E-41012 Seville, Spain
[2] Univ Seville, Dept Cell Biol, E-41012 Seville, Spain
[3] Univ Seville, CSIC, Hosp Univ Virgen del Rocio, Inst Biomed Sevilla, Seville 41013, Spain
[4] Univ Geneva, Chem Biol, Natl Ctr Competence Res, CH-1211 Geneva 4, Switzerland
[5] Univ Geneva, Sci 2, Dept Biochem, CH-1211 Geneva 4, Switzerland
[6] Univ Strasbourg, CSIC, Inst Biol Mol Plantes, F-67081 Strasbourg, France