3003
These results suggest an essential role of the binding of HNF - 4 and / or HNF - 4 - related nuclear factors to the 6 beta A - A site on the basal transcriptional activation of the CYP3A2 gene in liver cells .
 GENE: HNF - 4; GENE: HNF - 4 - related nuclear factors; GENE: CYP3A2 gene
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: HNF - 4; GENE: HNF - 4 - related nuclear factors; GENE: CYP3A2 gene