Procathepsin B, recombinant, 1mg. Procathepsin B, recombinant, Source: E. Coli, Species Reactivity: Human, Purity by SDS-PAGE: greater than or equal to 95%, Molecular Weight: 38.2 kDa, 18-339 amino acid + N-terminal poly-his tag, Synonyms: CTSB, CPSB, Appearance: Lyophilized, Size: 1mg