1. Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, S-17165 Solna, Sweden
2. Department of Biosciences and Nutrition, Karolinska Institutet, S-14157 Huddinge, Sweden
3. Linderstro̷m-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, 2200 Copenhagen, Denmark
4. Department of Chemistry − BMC, Uppsala University, S-75123 Uppsala, Sweden
5. Department of Anatomy Physiology and Biochemistry, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden
6. Department of Cell and Molecular Biology, Uppsala University, S-75124 Uppsala, Sweden