18134
The protein folding structure of the six isoforms of IL - 32 does not resemble that of any classical cytokine and as of this writing , a specific IL - 32 receptor has not been identified .
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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