14048
Some transporters such as OATP1B3 and the bile salt export pump ( BSEP ) were however down - regulated by atRA in primary human hepatocytes , but induced in HepaRG cells , thus pointing out discrepancies between these two liver cell models in terms of detoxifying protein regulation .
 Chemical: atRA
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: atRA