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  • Title: Cloning of the rfb gene cluster of a group C2 Salmonella strain: comparison with the rfb regions of groups B and D.
    Author: Brown PK, Romana LK, Reeves PR.
    Journal: Mol Microbiol; 1991 Aug; 5(8):1873-81. PubMed ID: 1722557.
    Abstract:
    We report the cloning and mapping of the entire rfb gene cluster of a group C2 Salmonella strain. Comparison with the rfb region of group B strain LT2 and group D strain Ty2 reveals an 11.8 kb central region of limited similarity flanked by regions of high similarity. The genes from the central region confer a group C2 O-antigen structure on a Salmonella LT2 partial delete strain. The significance of this region in relation to function and evolutionary origin is discussed. We also report evidence for the existence of an O-antigen chain-length determinant in Escherichia coli K12 and propose a model for a possible mechanism by which a preferred chain length is determined.
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