1. Department of Protein Science, School of Chemistry, Biotechnology and Health (CBH), KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
2. Spiber Technologies AB, Roslagstullsbacken 15, 114 21 Stockholm, Sweden
3. Division of Micro and Nanosystems, School of Electrical Engineering and Computer Science (EECS), KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
4. Department of Chemistry, School of Chemistry, Biotechnology and Health (CBH), KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden