Surfactant protein A (SP-A) is synthesized and secreted by lung epithelial cells. It belongs to group III of the family of C-type lectins, members of which possess an overall structure consisting of multiple globular head regions linked by triple-helical, collagen-like, strands. This group also includes SP-D, and the serum proteins mannan-binding protein, conglutinin, and collectin-43, all of which bind to the C1q receptor found on a wide variety of cells. Both SP-D and SP-A enhance oxygen radical production by alveolar macrophages. The serum concentration is 45 ng/mL in healthy individuals.
- For ELISA, Flow Cytometry, Immunohistochemistry, Western Blot
Recognizes human surfactant protein D.
Antigen: SURFACTANT PROTEIN D
Isotype: IgG1 ?