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Cathepsin H has been used to determine the potential of aziridinyl peptides to act as inhibitors of this protein and potentially explore their therapeutic applications.

Cathepsin Hderived from human liverserves dual functions as both an aminopeptidase and an endopeptidase. It plays a significant role in the catabolism of proteins within lysosomes. Cathepsin H is classified as an endoaminopeptidase because it can hydrolyze proteinsN-terminal substituted proteinsamino acid derivativesand peptides with different chain lengths and N-terminal free amino acid derivatives. This protein is also observed to exhibit amidase and esterase activity.