Definition of "proteinase" [proteinase]

• An endopeptidase, such as pepsin, trypsin, or papain. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "One of these roles involves activation of a class of cell surface proteins called proteinase activated receptors PARs."
• "In 1959, Research Corporation for Science Advancement awarded Dr. Lipscomb a grant "for determination of the molecular structure of an enzyme, a proteinase from Tetra-hymena pyriformis W, by x-ray diffraction methods.""
• "Grazing-induced proteinase inhibitors: a possible cause for lemming population cycles."