The VDR storage site in human platelets.

<p>(A) Platelets observation by electron microscopy revealed a well preserved cell structure and organization of intracellular granules. Sample was processed in absence of anti-VDR primary antibody. (B) Immunogold labelling of VDR in human platelets, showing occasional VDR labelling in mitochondria (M) and cytosol, with no significant labelling of alpha granules (A), or plasma membrane. Inset shows a mitochondrial structure under higher magnification. Experiments were performed as outlined in Immunoelectron microscopy section.