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  • Title: Identification and characterization of trypsin, chymotrypsin and elastase inhibitors in porcine serum.
    Author: Weström BR.
    Journal: Hoppe Seylers Z Physiol Chem; 1979 Dec; 360(12):1869-78. PubMed ID: 93564.
    Abstract:
    Characterization of the trypsin-, chymotrypsin- and elastase-inhibiting properties of porcine serum was carried out by gel filtration on Ultrogel, AcA 44, and agarose gel electrophoresis with subsequent processing for protease-inhibiting activity. Moreover, by allowing the fractions obtained from gel filtration to react with antibodies to porcine serum protease inhibitors, the specific inhibiting properties of these inhibitor molecules were identified. At least six protease inhibitors were identified and partially characterized in porcine serum. Two alpha 2 -macroglobulins (alpha 2 Mf and alpha 2 Ms), homologues to human alpha 2 -macroglobulin, with slightly different electrophoretic mobilities, were both found to exhibit trypsin, chymotrypsin and elastase inhibiting activity. Alpha 1 -Protease inhibitor (Mr 51 000), a homologue to human alpha 1 -protease inhibitor (alpha 1 -antitrypsin), also showed trypsin-, chymotrypsin- and elastase-inhibiting properties. Inter-alpha-trypsin inhibitor (Mr 162 000 and 129000), a porcine serum counterpart to human inter-alpha-trypsin inhibitor, showed trypsin- and chymo-trypsin-inhibiting properties. In addition, a specific trypsin inhibitor, alpha 2 -antigrypsin (Mr 58 000), and a specific elastase inhibitor, beta-elastase inhibitor, were characterized in porcine serum, and these seem to have no counterparts in human serum.
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