Enzyme. Procathepsin K, mouse recombinant, Predominant proteinase responsible for the resorption of the bone matrix, Source: E. coli, Purity: G95%, (23.6 kDa) by proteolytic cleavage of its 99-amino-acid propeptide domain, Synonyms: Cathepsin O, Storage: -80 degree C, Pack Size: 10ug