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The inactive precursor, lyso-platelet-activating factor , at a concentration as high as 10(-7) M had no effect on any of the membrane phospholipids .
 protein: lyso-platelet-activating factor
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: lyso-platelet-activating factor