1743
Thus , the mutants are deficient in production of the O - antigen polymerase and were termed rfc mutants .
 GENE: O - antigen polymerase; GENE: rfc 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: O - antigen polymerase; GENE: rfc mutants