Microbial Evolution Research Group, Department of Biology, University of Oslo, Blindern, N-0316 Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Blindern, N-0316 Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Blindern, N-0316 Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Blindern, N-0316 Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Blindern, N-0316 Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Blindern, N-0316 Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Blindern, N-0316 Oslo, Norway. surendra.kumar@bio.uio.no