3037
Claudin - 3 ( CLDN3 ) and claudin - 4 ( CLDN4 ) are the major structural molecules that form tight junctions ( TJs ) between epithelial 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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