1509
Apart from iron regulation , sodA expression was affected by changes in DNA topology induced by coumermycin A but not by the global virulence regulatory Bvg system .
 GENE: sodA; GENE: Bvg system
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: sodA; GENE: Bvg system