1. Plant Pathology Section, Department of Plant Biology, The Royal Veterinary and Agricultural University, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Copenhagen, Denmark (F.Z., Z.Z., P.L.G., E.d.N., D.B.C., H.T.-C.)
2. Danisco Biotechnology, Copenhagen, Denmark (J.D.M.)