2299
In the human stomach , the peptide trefoil factor family 2 ( TFF2 ) is secreted together with the mucin MUC6 by mucous neck cells ( MNCs ) and antral gland cells .
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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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