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Different expression and genetic control for the K99 antigen and its associated adhesin

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Abstract

Cultivation of K99+ wild strains and transconjugants in MINCA medium with variable concentrations of glucose, glycerol, alanine, or protein-interfering antibiotics shows that the K99 antigen and its associated adhesin are expressed in different ways. The addition of cAMP to medium containing a K99-repressive concentration of glucose demonstrates that the K99-antigen production is controlled by the cAMP-CRP complex, but this does not occur with the adhesin production. Sub-inhibitory concentrations of protein-interfering antibiotics inhibit the K99-antigen production, but do not correlatively affect the adhesin production. All these experiments suggest that the K99 antigen and the adhesin are different structures whose genes are controlled by different mechanisms.

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Ferreiros, C.M., Criado, MT. Different expression and genetic control for the K99 antigen and its associated adhesin. Current Microbiology 8, 221–224 (1983). https://doi.org/10.1007/BF01579550

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  • DOI: https://doi.org/10.1007/BF01579550

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