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  • Title: Purification and characterization of a neutral protease from rat-liver cytosolic fraction.
    Author: Hiroi Y, Natori Y.
    Journal: J Biochem; 1987 Nov; 102(5):985-92. PubMed ID: 3125167.
    Abstract:
    Rat liver cytosol contains a neutral protease which degrades acetylated hemoglobin and some urea-denatured proteins maximally at pH 7.5. The enzyme was purified to homogeneity by conventional chromatographic techniques. It appears to be a metalloprotease since it is inhibited by EDTA and o-phenanthroline, the metal-depleted enzyme can be reactivated by Co2+, Zn2+, Mn2+, or Mg2+, and it is not inhibited by reagents specific for carboxyl, seryl, or thiol proteases. The enzyme has an apparent molecular weight of 200,000 as determined on Sephacryl S-200 column chromatography, and electrophoresis in sodium dodecyl sulfate showed 3 protein bands corresponding to the molecular weights of 110,000, 74,000, and 40,000.
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