The first evidence for the cancer therapeutic potential of A2- 32-01 was illustrated by its cytoxicity in leukemic cell lines such as OCI-AML2, TEX, and K562, although it had no effect on the acute promyelocytic leukemic HL-60(Table 1). Notably, the level of HsClpP expression is highly elevated in OCIAML2, TEX, and K562 in comparison to the level in HL-60.28 In addition, A2-32-01 is also cytotoxic in the 143B osteosarcoma cell line but not for the mitochondrion-depleted143B Rho (0) cells(Table 1).