1. Center for Molecular Protein Science, Biophysical Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden, Organic Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden, SARomics Biostructures AB, P.O. Box 724, SE-22007 Lund, Sweden, Theoretical Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden, and Section MIG, Department of Laboratory Medicine, Lund University, Sölvegatan 23, SE-22362 Lund, Sweden