1601
We were unable to construct chvI or chvG insertion mutants of R . meliloti , whereas mutants carrying insertions outside of these genes were readily obtained .
 GENE: chvI; GENE: chvG insertion mutants
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: chvI; GENE: chvG insertion mutants