using alkaline phosphatase and monoclonal-anti-alkaline phosphatase antibodies ( apaap ) , all the calcium-binding proteins were detected by immunohistochemical techniques in the plasma membranes of many cells , such as vascular endothelial cells , lymphocytes , epididymal principal cells , secretory and excretory duct cells of certain exocrine glands , straight distal tubular cells of the kidney , and in the cytoplasm of muscle cells and fibres as well as nerve cells and chondrocytes , and in connective tissue elements .
C0007634
cells
C0225369
chondrocytes