Cellular Uptake of Cystatin C. Subcellular localisation and intracellular effects of a secreted cysteine protease inhibitor
Cystatin C is a cysteine protease inhibitor, aimed for secretion, as it is produced with a signal peptide. Its target enzymes are thought to be the lysosomal cysteine cathepsins and legumain. Cystatin C has been considered to excert its enzyme inhibiting functions extracellularly, as a defense against enzymes from leaking lysosomes or invading pathogens. It was demonstrated by various techniques,
