1. Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI), Chennai 600 020, India
2. Department of Crystallography and Biophysics, University of Madras, Chennai 600 025, India
3. Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695 019 Kerala, India