LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Proteinase inhibitor. Molecular model of a proteinase inhibitor, or antitrypsin, molecule bound to a tryspin protease. The proteinase inhibitor is a type of serine protease inhibitor (serpin) and is named after its ability to covalently bind and irreversibly inactivate serine proteases, including the digestive enzyme trypsin.
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