28417
Simple top - down sequential addition of immune - evading or receptor - specific antibody elements conjugated to biosurfactant protein DAMP4 promotes self - assembly at an interface previously formed in the presence of peptide surfactant AM1 , leading to a functional display at the interface through non - covalent molecular self - assembly .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None