4841
To evaluate the roles of these AKR1B enzymes , we investigated expression of AKR1B1 and AKR1B10 in 47 paired samples of cancerous and adjacent control endometrium at the mRNA and protein levels , by quantitative PCR , Western blotting and immunohistochemistry staining .
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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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