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
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: sodA, Bvg system 
Answer:
 GENE: sodA; GENE: Bvg system