5233
( iv ) Although UCRBP has been previously shown to act as a transcriptional repressor , we show here that UCRBP can also act as a positive transactivator of a reporter driven by UCR elements when used in co - transfection assays .
 UCRBP, UCRBP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 UCRBP, UCRBP