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Inspection of X . tropicalis , mouse and human U6 DNA upstream sequences revealed the presence of a TATA box as well as of the proximal and enhancer ( octamer motif ) elements contained in snRNA genes transcribed by RNA polymerase II .
 GENE: X . tropicalis , mouse and human U6 DNA upstream sequences; GENE: RNA polymerase II
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: X . tropicalis , mouse and human U6 DNA upstream sequences; GENE: RNA polymerase II