Granular striated ducts, light micrograph
Granular striated ducts, light micrograph. The submandibular gland of rodents has a special type of striated duct characterized by the presence of large secretory granules, which contain a variety of peptides and enzymes such as kallikrein, epidermal growth factor, renin and nerve growth factor. Semithin resin section 0.5 micrometres thick stained with toluidine blue., by JOSE CALVO/SCIENCE PHOTO LIBRARY
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