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Journal of Bacteriology, October 1999, p. 6092-6097, Vol. 181, No. 19
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Characterization of a Group of Anaerobically Induced, fnr-Dependent Genes of Salmonella typhimurium

Yan Weidagger and Charles G. Miller*

Department of Microbiology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801

Received 31 March 1999/Accepted 21 July 1999

We have previously reported the isolation of a group of anaerobically regulated, fnr-dependent lac fusions in Salmonella typhimurium and have grouped these oxd genes into classes based on map position. In order to identify these genes, we have replaced the original Mud-lac fusion in a member of each oxd class with the much smaller Mud-cam element, cloned the fusion, and determined DNA sequence sufficient to define the oxd gene. Several of the fusions correspond to previously known genes from S. typhimurium or Escherichia coli: oxd-4 = cbiA and oxd-11 = cbiK, oxd-5 = hybB, oxd-7 = dcuB, oxd-8 = moaB, oxd-12 = dmsA, and oxd-14 = napB (aeg-46.5). Two other fusions correspond to previously unknown loci: oxd-2 encodes an acetate/propionate kinase, and oxd-6 encodes a putative ABC transporter present in S. typhimurium but not in E. coli.

* Corresponding author. Mailing address: Department of Microbiology, University of Illinois at Urbana-Champaign, B103 Chemical & Life Sciences Laboratory, 601 South Goodwin Ave., Urbana, IL 61801. Phone: (217) 244-8418. Fax: (217) 244-6697. E-mail: charlesm{at}uiuc.edu.

dagger Present address: Roche Vitamins Inc., Nutley, NJ 07110.

Journal of Bacteriology, October 1999, p. 6092-6097, Vol. 181, No. 19
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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