<p>(A) Localization of AAT in the temporal artery. Specimen stained with polyclonal anti-AAT (1∶5000) showed immunoreactivity on the endothelial surface and a gradient of presumably soluble AAT within the vessel wall. (B) ATZ11 (1∶100) showed a distinct staining of the endothelial layer. (C) The endothelial layer is distinctly stained using anti-VFW (1∶500). (D) After saturation with anti-AAT antibody (1∶10), ATZ11 labeled a thin endothelial layer. (E) Blockade with anti-VWF antibody (1∶10) abolished ATZ11 staining (1∶100) of the endothelial layer. (F) Sequential blockade with anti-AAT (1∶10) and anti-VWF (1∶10) completely abolished ATZ11 staining (1∶100).</p
