1877
Moreover , this enhancement of transcriptional activation by COUP - TFI requires specifically the AF - 1 transactivation function of ER and can be observed in the presence of E2 or 4 - hydroxytamoxifen but not ICI 164384 .
 GENE: COUP - TFI; GENE: ER
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: COUP - TFI; GENE: ER