1998
We infer that RecA - mediated cleavage of UmuD is another role for RecA in SOS mutagenesis , probably activating UmuD for its mutagenic function .
 GENE: RecA; GENE: UmuD; GENE: RecA; GENE: UmuD
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: RecA; GENE: UmuD; GENE: RecA; GENE: UmuD