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Western blot of nSMase3a and nSMase3b GFP transfectants (A) and nSMase3 siRNA knockdown in C2C12 myotubes (B). Both blots were probed with anti-nSMase3 (C-terminal region) rabbit polyclonal antibody (SP0281). (Image provided by Dr. Jennifer Moylan, Dept. Physiology, University of Kentucky).