Expression, purification, crystallization and preliminary X-ray diffraction studies of human cathepsin F complexed with an irreversible vinyl sulfone inhibitor.

Cathepsin F is a cysteine protease believed to be involved in the antigen-presenting process of the class II major histocompatibility complex (MHC-II) in macrophages. It has been expressed, purified and crystallized. A complete data set to a resolution of 2.