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Characterization of a tonB - phoA gene fusion suggests that the amino - terminal 41 amino acids of TonB are sufficient to promote export of the fusion protein and presumably TonB as well .
 GENE: tonB; GENE: phoA; GENE: TonB; GENE: TonB
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: tonB; GENE: phoA; GENE: TonB; GENE: TonB