1. Catalysis and Peptide Research Unit
2. School of Health Sciences
3. University of KwaZulu-Natal
4. Durban 4001
5. South Africa
6. CIBER-BBN
7. Networking Centre on Bioengineering
8. Biomaterials and Nanomedicine
9. 08028-Barcelona
10. Spain
11. Department of Chemistry
12. Faculty of Science
13. Alexandria University
14. Alexandria 21321
15. Egypt