This is a family of bacterial Fe(2+) trafficking proteins.

1: Small genes/gene-products in Escherichia coli K-12. Wasinger VC, Humphery-Smith I; FEMS Microbiol Lett 1998;169:375-382. PMID:9868784

2: Comparing the predicted and observed properties of proteins encoded in the genome of Escherichia coli K-12. Link AJ, Robison K, Church GM; Electrophoresis 1997;18:1259-1313. PMID:9298646

3: The solution structure of the oxidative stress-related protein YggX from Escherichia coli. Osborne MJ, Siddiqui N, Landgraf D, Pomposiello PJ, Gehring K; Protein Sci 2005;14:1673-1678. PMID:15883188