Cathepsin D is synthesized as a 54kDa precursor， which is proteolytically processed to an intermediate 48kDa single chain， which matures into more stable 34kDa and 14kDa two chain form. It is an estrogen-regulated lysosomal protease that has been suggested to facilitate cancer cell migration and invasion by digesting the basement membrane， extracellular matrix， and xonnective tissue. Because of its mitogenic and proteolytic activities， it has been implicated as a prognostic marker in many tumor types. Cathepsin D is expressed in epithelial cells as well as in macrophages.
应用类型
ELISA， Western blot
免疫原
Anti-human CTSD mAb is derived from hybridization of mouse SP2/O myeloma cells with spleen cells from BALB/c mice immunized with recombinant human CTSD amino acids 21-412 purified from E. coli.
