Abstract
Summary
Immunoelectrophoresis demonstrates the presence of three serum proteins in canine surfactant protein obtained in vivo by bronchopulmonary lavage. The surfactant protein inhibits trypsin and the trypsin inhibitor has electrophoretic mobility similar to that of human alpha-1-antitrypsin. The trypsin inhibitor is present when lavage follows saline perfusion of the pulmonary vasculature suggesting that although the trypsin inhibitor may arrive in the lung via the blood, it is not in the lavage fluid as a result of whole blood contamination.
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