Betanin, a betacyanin pigment purified from fruits of Opuntia ficus-indica induces apoptosis in human chronic myeloid leukemia cell line-K562 - Sreekanth, D; Arunasree, M K; Karnati, R; Roy, T; Chandramohan, R; Reddy, G V; Pallu, R (Phytomedicine, 2007)