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  • Title: A comparison of four sulfhydryl cathepsins (B, C, H, and L) from porcine spleen.
    Author: Lynn KR, Labow RS.
    Journal: Can J Biochem Cell Biol; 1984 Dec; 62(12):1301-8. PubMed ID: 6529703.
    Abstract:
    Four sulfhydryl cathepsins, B, C (dipeptidyl aminopeptidase I), H, and L were isolated from porcine spleen. They are all glycoproteins of similar amino acid compositions, which are comparable with those of cathepsins B and H from other sources and so with papain. All four cathepsins exist in multiple charged forms: B, C, H, and L have isoelectric points in the range 4.3-5.4, 5.3 and 5.9, 5.2-5.7, and 7-8.7, respectively. The molecular weights of cathepsins B and H were 24 000 and 26 000. Anomalous behaviour of cathepsin L on both conventional gel filtration and high pressure liquid chromatography precluded a precise assessment of its weight which is between 22 000 and 28 000. The isolated mercurial derivative of cathepsin C has a molecular weight of 56 000 (an active dimer formed on reduction). Cathepsins B and H also aggregate.
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