The major goals of our research are to characterize the individual proteases (primarily from the cathepsin family) and their inhibitors (stefins, cystatins and related proteins) and to unravel the molecular mechanisms of processes leading to programmed cell death or regulating the immune response of the organism. In addition, our research is focused towards understanding the roles of proteases in various pathological processes, such as cancer, rheumatoid arthritis and osteoarthritis, and different neurological disorders (Huntington disease, …).