Abstract
Bovine lung surfactant material, isolated by three steps of centrifugation from lung washings, had a phospholipid: protein ratio of 4.98 ± S.D. 0.62 μmol/mg. Sucrose continuous density gradient centrifugation showed only one visible band at a density of 1.081 g/ml. Sodium dodecyl sulfate-disc gel electrophoresis patterns of the apoprotein extracted from this material revealed that the main component (70–80%) of the protein subunits of bovine lung surfactant material has a molecular weight of 36 000. It was suggested that the apoprotein of bovine lung surfactant material exists as a combination of a few protein subunits, most of which have a molecular weight of 36 000.
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Schedule a callMore From: Biochimica et Biophysica Acta (BBA) - Protein Structure
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