1. Chemistry Department; King Fahd University of Petroleum and Minerals; Dhahran 31261 KSA
2. Department of Microbiology and Molecular Genetics; Michigan State University; East Lansing MI 48824 USA
3. Department of Biochemistry and Molecular Biology; Michigan State University; East Lansing MI 48824 USA
4. Division of Biological and Environmental Sciences and Engineering; King Abdullah University of Science and Technology; Thuwal 23955-6900 KSA