12944
The inappropriate accumulation of RIF1 at DSBs in S phase is antagonized by BRCA1 , and deletion of Rif1 suppresses toxic nonhomologous end joining ( NHEJ ) induced by PARP inhibition in Brca1 - deficient cells .
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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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