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We furthermore show that the assay can identify proteins required for mitotic chromosome formation de novo by isolating mutants in condensin , DNA polymerase epsilon , and F - box DNA helicase I that are specifically defective in pro - / metaphase condensation .
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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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