10544
In the present study , using murine bone marrow - derived mast cells ( BMMC ) from Rab27 - deficient mutant mice , we found that , in contrast to Rab27b , Rab27a primarily plays an inhibitory role in regulating degranulation .
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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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