2153
We have determined that several E1 mutants mapping in both the M and R regions and a single mutant of the upstream regulatory region have a higher transforming activity on mouse C127 cells than the wild - type genome does .
 GENE: E1 mutants
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: E1 mutants 
Answer:
 GENE: E1 mutants