3983
Experiments with N - and C - terminal fragments revealed that the C - terminal tetrapeptide ( CCK - 5 - 8 ) was the active centre of the CCK octapeptide molecule .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
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