1. Department of Biochemistry and Molecular Biology, University of Buea, Buea, Cameroon
2. The Biotechnology Centre, University of Yaoundé 1, Yaoundé, Cameroon
3. The Biotechnology Unit, University of Buea, Cameroon
4. Department of Biochemistry, University of Dschang, Dschang, Cameroon
5. Department of Biochemistry, University of Yaoundé 1, Yaoundé, Cameroon