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Immunohistochemical characterisation of ACE2 distribution in the lung, small intestine and kidney of large felids and livestock. Positive immunolabelling of ACE2 was observed in the cilia of the bronchiolar epithelium (red arrow heads) in the Asiatic lion (Panthera leo leo), Siberian tiger (Panthera tigris altaica) and sheep (Ovis aries). In addition, ACE2 was detected on the brush border of the intestinal and renal tubular epithelial cells. Images taken at 400× magnification
