[1] Salzburg Univ, Dept Genet, A-5020 Salzburg, Austria
[2] Acad Sci Czech Republ, Inst Microbiol, Prague, Czech Republic
[3] Univ Tubingen, Dept Physiol Chem, D-72074 Tubingen, Germany
[4] Univ Vienna, Dept Bot, A-1010 Vienna, Austria
[5] Univ Vienna, Dept Histol & Embryol, A-1010 Vienna, Austria
[6] Graz Tech Univ, Dept Biochem, A-8010 Graz, Austria
[7] UNSW, Sch Biochem & Mol Biol, Sydney, NSW, Australia