CMPG-BioI, Department of Microbial and Molecular Systems, K.U.Leuven, Kasteelpark Arenberg 20, B-3001 Leuven-Hevelee, Belgium.|CMPG-BioI, Department of Microbial and Molecular Systems, K.U.Leuven, Kasteelpark Arenberg 20, B-3001 Leuven-Hevelee, Belgium.|CMPG-BioI, Department of Microbial and Molecular Systems, K.U.Leuven, Kasteelpark Arenberg 20, B-3001 Leuven-Hevelee, Belgium.|CMPG-BioI, Department of Microbial and Molecular Systems, K.U.Leuven, Kasteelpark Arenberg 20, B-3001 Leuven-Hevelee, Belgium.