2785
While the individual apparent K ( M ) values of CYP2B4 and CYP2E1 for CPR are similar , the apparent K ( M ) of CYP2E1 for CPR in the presence of CYP2B4 decreased significantly , thus suggesting that CYP2B4 enhances the affinity of CYP2E1 for CPR and this may allow CYP2E1 to out - compete CYP2B4 for CPR .
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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