1662
Reconstitution of MCF - 7 cell extracts with procaspase - 3 corrects this defect , resulting in an efficient and complete processing of procaspase - 9 .
 MCF - 7 cell extracts
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 MCF - 7 cell extracts