16741
Rad9 , an evolutionarily conserved checkpoint gene with multiple functions for preserving genomic integrity , has been shown to play important roles in homologous recombination repair , base excision repair and mismatch repair .
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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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