21647
FPR2 is activated by an array of ligands , which include structurally unrelated lipids and peptide / proteins agonists , resulting in different intracellular responses in a ligand - specific fashion .
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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:
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