22273
These findings support a model in which reduced trimer stability causes these mutant PCNA proteins to occasionally undergo conformational changes that compromise their ability to stimulate TLS by both replicative and translesion polymerases .
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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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