6091
Here , we show that the von Willebrand ( vWA ) domain of Ku80 fulfills a critical role in this process by recruiting Aprataxin - and - PNK - Like Factor ( APLF ) into Ku - DNA complexes .
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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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