1. Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 64, India, Institute of Bioinformatics and Applied Biotechnology, ITPB, Bangalore, India, Molecular Biophysics Unit, Indian Institute of Science, Bangalore, India, and Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 06, India