Identification, isolation, and partial characterization of a 7.5-kda surfactant-associated protein

Gurmukh Singh, Sikandar L. Katyal, William E. Brown, Amy L. Kennedy, Mari Lou Wong-Chong, Shirley A. Gottron

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2 Scopus citations


Human surfactant was analyzed for proteins associated with the lipids. Surfactant was isolated from lung lavage by the salt gradient centrifugation method, and the soluble proteins binding to the lipids were recovered by extraction with a low pH buffer. Antiserum to this preparation reacted with surfactant apoprotein A and a 7.5-kDa protein. The 7.5-kDa protein was isolated from reduced and alkylated lung lavage pellet by chromatography. The N-terminal amino acid sequence of the protein indicates that it is a novel protein.

Original languageEnglish (US)
Pages (from-to)559-567
Number of pages9
JournalExperimental Lung Research
Issue number3
Publication statusPublished - Jan 1 1991
Externally publishedYes


ASJC Scopus subject areas

  • Molecular Biology
  • Pulmonary and Respiratory Medicine
  • Clinical Biochemistry

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