11916
Flow cytometric analysis revealed a BC - induced arrest of the cell cycle in the G2 phase associated with downregulation of alpha - tubulin , alpha 1 - tubulin , beta 5 - tubulin expression .
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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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