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proteolysis Line breaks: pro¦te|oly¦sis
Pronunciation: /ˌprəʊtɪˈɒlɪsɪs/

Definition of proteolysis in English:


[mass noun] Biochemistry
The breakdown of proteins or peptides into amino acids by the action of enzymes.
Example sentences
  • As a cheese ages, fats and proteins break down through proteolysis, into simplified units via bacterial or fungal actions.
  • A protein resistant to heat and proteolysis that inhibits serine proteases was isolated from wheat leaf apoplasts.
  • Chapter 5 focuses on the catabolism of proteoglycans, detailing mainly proteolysis and the host of proteases involved.


Pronunciation: /ˌprəʊtiːəˈlɪtɪk/
Example sentences
  • Most notably, there are the proteolytic enzymes trypsin and chymotrypsin, which our bodies make.
  • The biochemical degradation of proteins through hydrolysis of peptide bonds is caused by the action of proteolytic enzymes or proteases.
  • Fibrinogen and its proteolytic cleavage product, fibrin, are critical plasma proteins with multiple functions in blood clotting.
Pronunciation: /ˌprəʊtiːəˈlɪtɪk(ə)li/
Example sentences
  • All 3 proteins are proteolytically regulated by sterols.
  • The proteolytically modified actins were used within 1 day.
  • We therefore developed proteogest, a program that generates basic descriptive statistics for both the intact and proteolytically processed proteome.


Late 19th century: modern Latin, from protein + -lysis.

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