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Immunoblot analysis revealed that the inhibitory effect results from downregulation of phosphorylation of both Syk kinase and phosphatidylinositol 3 - kinase in the signalling pathways involved in degranulation caused by the antigen - antibody interaction .
 Chemical: phosphatidylinositol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: phosphatidylinositol