cathepsins
 oxford
 views  updated Jun 11 2018cathepsins (Also 
kathepsins); a group of intracellular enzymes in animal tissues which hydrolyse proteins. They are involved in the normal turnover of tissue protein, and the softening of meat when 
game is hung.
  A Dictionary of Food and Nutrition DAVID A. BENDER
   cathepsins
 oxford
 views  updated May 11 2018cathepsins Protein-digesting enzymes that are found in 
lysosomes.
  A Dictionary of Biology