1. Department of Biochemistry, Middle East Technical University, Cankaya, 06800 Ankara, Turkey
2. Department of Chemistry, Middle East Technical University, Cankaya, 06800 Ankara, Turkey
3. Department of Biology, Middle East Technical University, Cankaya, 06800 Ankara, Turkey
4. Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Cankaya, 06800 Ankara, Turkey