1cjl: CRYSTAL STRUCTURE OF A CYSTEINE PROTEASE PROFORM
1cs8: CRYSTAL STRUCTURE OF PROCATHEPSIN L
1icf: CRYSTAL STRUCTURE OF MHC CLASS II ASSOCIATED P41 II FRAGMENT IN COMPLEX WITH CATHEPSIN L
1mhw: Design of non-covalent inhibitors of human cathepsin L. From the 96-residue proregion to optimized tripeptides