28072
Thus , while both Metnase and Artemis are biochemically capable of resolving a variety of damaged DNA ends for the repair of complex double - strand breaks , Artemis appears to act more efficiently in the context of other nonhomologous end joining proteins .
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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:
 None