Cytotoxicity effect of 6-mercaptopurine and 6-mercaptopurine riboside on RAW 264.7 and HIG-82 cell lines - Che Ku Daud, Che Ku Dahlan; Zailani, Muhamad Zulhilmi; Sukiman, Nor Erma Suryana; Tham, Chau Ling; Ahmad, Zuraini; Yong, Yoke Keong; Mohd Zain, Zetty Nadia; Abdullah, Muhammad Nazrul Hakim (Department of Biology, Faculty of Science, Universiti Putra Malaysia, 2014)