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A major task for the future is to understand how intra - kinetochore stretch is generated when microtubules bind the kinetochore .
 kinetochore, microtubules, kinetochore
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 kinetochore, microtubules, kinetochore