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| Pulmonary Surfactant-Associated Protein A SP-A Protein | Surfactant Protein A | Pulmonary Surfactant Associated Protein A | SP A Protein An abundant pulmonary surfactant-associated protein that binds to a variety of lung pathogens, resulting in their opsinization. It also stimulates MACROPHAGES to undergo PHAGOCYTOSIS of microorganisms. Surfactant protein A contains a N-terminal collagen-like domain and a C-terminal lectin domain that are characteristic of members of the collectin family of proteins. |