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Any of various enzymes found in animal tissue that catalyze the hydrolysis of proteins into smaller proteins.

[German Kathepsin, from Greek kathepsein, to digest : kat-, kata-, cata- + hepsein, to boil.]
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.


(Biochemistry) a proteolytic enzyme responsible for the autolysis of cells after death
[C20: from Greek kathepsein to boil down, soften]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(kəˈθɛp sɪn)

any of a class of intracellular enzymes that break down protein in certain abnormal conditions and after death.
[1925–30; < Greek kathéps(ein) to digest]
ca•thep′tic (-tɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The most active cysteine proteinase in raw fillets of Pacific whiting was identified as cathepsin B while the degradation of myosin in fillets and surimi gels during conventional heating was caused by cathepsin L [13].
Proteolytic activity may also be elevated by cathepsin L that is believed to activate pro-urokinase-type plasminogen activator (prouPA) to its active form (uPA) [41].
Background: Cathepsin L (CatL) is a cysteine protease with strong matrix degradation activity that contributes to photoaging.
Laminar Shear Stress Inhibits Cathepsin L Activity in Endothelial Cells.
Global Markets Direct's, 'Cathepsin L (EC - Pipeline Review, H1 2016', provides in depth analysis on Cathepsin L (EC targeted pipeline therapeutics.
Relationship between tenderising the levels of cathepsin B, cathepsin L, calpain I, calpain II, and AY-glucoronidaes.Meat Sci.
Liver expression (mRNA) of cathepsin B, cathepsin L, and [beta]-D-glucuronidase (qPCR)
were the first to show that mouse-activated T cells and mast cells expressed the mRNA encoding proteins, cytotoxic T-lymphocyte antigen-2s (CTLA-2[alpha] and CTLA-2[beta]), which were shown to be highly homologous to the proregions of mouse cathepsin L [1] (Figure 1).
San Jose, CA, February 09, 2013 --( AnaSpec is pleased to announce the release of two new SensoLyte[R] assay kits for the measurement of Cathepsin L activity - the SensoLyte[R] 520 and Rh110 Cathepsin L Assay Kits.
DAP I by 429%, DAP II by 355% and DAP IV by 178%, followed by cathepsin L (246%), cathepsin D (123%), tripeptidyl aminopeptidase (109%), arginyl aminopeptidase (78%), alanyl aminopeptidase (72%), leucyl aminopeptidase (49%), cathepsin H (37%) and proline endopeptidase (19%).
Elastonyl combats the degradation of elastic tissue by inhibiting the expression of proteolytic enzymes such as MMP-1, MMP-2 and cathepsin L. This new ingredient favors the organization of the fibril network by stimulating the synthesis of collagen and fibrillin.