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Schematic representation of an apoptotic caspase cascade. (A) The cascade is caused by fibronectin oscillations in a low frequency alternating magnetic field controlled by AS-14-GMNPs. (B) Forces applied to an AS-14-GMNP in the presence of a low frequency alternating magnetic field, where 
is the force pulling fibronectin; 
is the magnetic moment of GMNP; and 
is an external magnetic field.
