Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. johan.fredriksson@gu.se.|Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, Sweden. malte.hermansson@cmb.gu.se.|Department of Civil and Environmental Engineering, Water Environment Technology, Chalmers University of Technology, Gothenburg, Sweden. britt-marie.wilen@chalmers.se.