6089
NHEJ is regulated by a series of interactions between core components of the pathway , including Ku heterodimer , XLF / Cernunnos , and XRCC4 / DNA Ligase 4 ( Lig4 ) .
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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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