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Expression of thin aggregative fimbriae (Agf) in Salmonella, which is responsible for bacterial cell adhesion to surfaces, aggregation, and formation of biofilms, is regulated by a complex mechanism. In order to identify gene(s) involved in the expression of Agf, the TnphoA transposon was introduced into Salmonella typhimurium χ8505 for random mutagenesis. Colonies showing a change from wrinkly-rough...
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