21432
Involvement of the intrinsic / mitochondrial apoptotic pathway was indicated by decreased levels of B - cell lymphoma 2 ( Bcl2 ) protein and mitochondrial cytochrome c , and by increased levels of mitochondrial Bcl - 2 - associated X protein ( Bax ) and cytosolic cytochrome c .
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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:
 None