1. Chemistry Department, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Malaysia
2. Centre of Foundation Studies for Agricultural Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Malaysia
3. Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
4. UPM-MAKNA Cancer Research Laboratory, Institute of Biosciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia