[1] John Innes Inst, Dept Biol Chem, Norwich Res Pk, Norwich NR4 7UH, Norfolk, England
[2] Univ East Anglia, Sch Chem, Norwich NR4 7TJ, England
[3] Faculdade Ciencias Farmaceut Ribeirao Preto, USP, BR-14040903 Ribeirao Preto, SP, Brazil
[4] Univ Dundee, Div Cell Biol & Immunol, Coll Life Sci, Wellcome Trust Bioctr, Dundee DD1 5EH, Scotland