Department of Biotechnology, KTH-Royal Institute of Technology, SE-106 91 Stockholm, Sweden. anders.andersson@biotech.kth.se|Department of Biotechnology, KTH-Royal Institute of Technology, SE-106 91 Stockholm, Sweden. anders.andersson@biotech.kth.se|Department of Biotechnology, KTH-Royal Institute of Technology, SE-106 91 Stockholm, Sweden. anders.andersson@biotech.kth.se