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This family consists of some not yet well-characterized outer membrane proteins. The prototype of the family, YfaZ of Escherichia coli, was initially predicted to be a transmembrane ß-barrel and its localization to the outer membrane was confirmed by experimental methods. Its biological function however remains unclear. Homologs are also found in other genera, such as Shigella, Salmonella, Yersinia, Erwinia and Shewanella.
Proteome of the Escherichia coli envelope and technological challenges in membrane proteome analysis
Biochim Biophys Acta. 2008 Sep;1778(9):1698-713. doi: 10.1016/j.bbamem.2007.07.020. Epub 2007 Aug 11.
Proteomic analysis of the carbonate insoluble outer membrane fraction of the soft-rot pathogen Dickeya dadantii (syn. Erwinia chrysanthemi) strain 3937
J Proteome Res. 2007 Jan;6(1):62-9. doi: 10.1021/pr060423l.
New Escherichia coli outer membrane proteins identified through prediction and experimental verification
Protein Sci. 2006 Apr;15(4):884-9. doi: 10.1110/ps.051889506. Epub 2006 Mar 7.