18050
We designed protein chimera consisting of IL - 2 linked to light chain of anti - IL - 2 mAb S4B6 through flexible oligopeptide spacer ( Gly4Ser ) 3 .
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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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