10349
Furthermore , we showed that the pregnane X receptor ( PXR ) , which is an important regulator of PGP induction , is involved in the upregulation of PGP protein expression following exposure to these TKIs .
 Chemical: pregnane
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: pregnane