1954
We describe a genetic system for further characterizing the role of the extreme C - terminus of the beta subunit of E . coli RNA polymerase .
 GENE: E . coli RNA polymerase
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: E . coli RNA polymerase