7067
Epitope mapping using solution nuclear magnetic resonance confirmed that the antibody bound to the region of human IL - 13 implicated in the interaction with IL - 13R alpha 1 and IL - 13R alpha 2 .
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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