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A schematic representation of the magnetic switch for apoptosis signalling in in vitro cells and zebrafish. MNPs first bind to the death receptors, and subsequent aggregation on the application of a focused magnetic field triggers extrinsic apoptosis signalling. Magnetic switching of death receptor clustering results in the death of cells and also causes morphological changes in zebrafish. Reprinted with permission from ref. 83. Copyright 2012 Nature Publishing Group.
