Arsenic is a poison but scientists have found how it affects the process involved in cells that are affected by leukaemia. They said that the findings "could lead to better uses for arsenic in therapies for leukaemia with fewer side effects" - reported The Guardian.
Source: "RNF4 is a poly-SUMO-specific E3 ubiquitin ligase required for arsenic-induced PML degradation" Nature Cell Biology Published online: 13 April 2008 doi:10.1038/ncb1716
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