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Together , our data define caspase - 3 as an important integrator of the apoptotic process in MCF - 7 breast cancer cells and reveal an essential function of caspase - 3 for procaspase - 9 processing .
 MCF - 7 breast cancer cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 MCF - 7 breast cancer cells