We wish to acknowledge the help extended by Dr. N. Subba Rao, Mr. Krishnamachari, Mr. A. Inderjeet Singh Seghal, Mr. Arun Kumar Thakur of Bio-Informatics Centre, Jawaharlal Nehru University in many ways like Fax, email services. Help received from INSDOC, NIC, Mr. S. Venkatesan, Mr. N. Madhavan, Ms. Seema Choudhary, Ms. Anuradha Varma, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi are also gratefully acknowledged.