Objective To isolate and purify humansurfactant associate protein A(SP-A)from human bronchoalveolar lavage.
目的:提取及纯化人肺灌洗液中肺表面活性物质结合蛋白A(SP-A)。
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BACKGROUND: Current ultrasound contrast agents contain micro-bubbles with different gas composition, and the majority of shell materials are surfactant, human blood proteins, lipids and so on.