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Proteolysis is the directed degradation (digestion) of proteins by cellular enzymes called proteases or by intramolecular digestion.


Proteolysis is used by the cell for several purposes. They include:


Examples of serine proteases include:


Certain venoms, such as those produced by poisonous snakes, can also cause proteolysis. These venoms are, in fact, highly-evolved digestive fluids that begin their work outside of the body. Proteolytic venoms cause a wide range of toxic effects[1], including effects that are:

See also


  1. Hayes WK. 2005. Research on Biological Roles and Variation of Snake Venoms Loma Linda University.

External links

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