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 (pə-pā′ĭn, -pī′ĭn)
An enzyme obtained from the unripe fruit of the papaya that catalyzes the lysis of proteins, used especially as a meat tenderizer and digestive aid and formerly in medicine as a topical treatment for wounds.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(pəˈpeɪɪn; -ˈpaɪɪn)
(Biochemistry) a proteolytic enzyme occurring in the unripe fruit of the papaya tree, Carica papaya: used as a meat tenderizer and in medicine as an aid to protein digestion
[C19: from papaya]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.papain - a proteolytic enzyme obtained from the unripe papaya; used as a meat tenderizer
enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
With this background, the present study was aimed to prepare the cryptides from the natural actomyosin from the fish Catla catla using papain and to study their bioactive properties.
[12] Anson, M.L., 1938, "The estimation of papain, tyrosin, papain and cathepsin with haemoglobin," J.
Its green skin is inedible, but it's high in papain, an enzyme that helps digest protein.
One of the most remarkable pluses of this method is its efficiency--the use of modern bleaching additives, such as pyrophosphate and the enzyme papain, can whiten teeth without damaging the enamel.
A prescription ointment containing papain and urea may help.
But this activity was adversely affected by the addition of papain, a cysteine protease present in papaya, and which is useful in tenderizing meat and other proteins.
Papain, trypsin, chymotrypsin, alcalase and flavourzyme (from Sigma-Aldrich Co., USA) were used in this experiment.
Shoot is a partner in the firm of Sullivan Papain Block McGrath & Cannavo, P.C.
The FDA has announced that companies marketing unaproved ophthalmic balanced salt Solutions (BSS) and unapproved topical drug products containing papain must stop manufacturing and marketing these products or risk enforcement action.
The reversible tight-binding inhibitors target proteases of the papain superfamily of cystein proteases, which includes several mammalian cathepsins.
Now it is known that the fruit contains large quantities of vitamins A, B, and C, and that the papain found in the entire plant is a substance that has many uses because of its chemical affinity with the human body.