3507
The highly conserved region of U6 snRNA has a structural similarity with the catalytic domain of the negative strand of the satellite RNA of tobacco ring spot virus [ ( - ) sTRSV ] , suggesting that the highly conserved region of U6 snRNA forms the catalytic center .
 GENE: U6 snRNA; GENE: U6 snRNA
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: U6 snRNA; GENE: U6 snRNA