1. Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein 9301, South Africa
2. National Control Laboratory for Biological Products, University of the Free State, Bloemfontein 9301, South Africa
3. Centre for Bioinformatics and Computational Biology, Department of Biochemistry, University of Pretoria, Hatfield 0028, South Africa
4. Department of Genomic and Applied Microbiology, Georg-August-Universität Göttingen, 37073, Germany