1637
By deletion analysis of the MLS1 control region , we identified two sites , UAS1 and UAS2 , as important for efficient derepression of the gene .
 GENE: MLS1
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: MLS1