Characterised proteins in this family include probable iron export permease protein FetB, which is part of the ABC transporter complex FetAB, probably involved in iron export [1], and aluminium sensitive 3 protein, also part of an ABC transporter required for aluminum (Al) resistance [2]. This family also includes integral membrane proteins currently uncharacterised.

1: Overexpression of fetA (ybbL) and fetB (ybbM), Encoding an Iron Exporter, Enhances Resistance to Oxidative Stress in Escherichia coli. Nicolaou SA, Fast AG, Nakamaru-Ogiso E, Papoutsakis ET; Appl Environ Microbiol. 2013;79:7210-7219. PMID:24038693

2: ALS3 encodes a phloem-localized ABC transporter-like protein that is required for aluminum tolerance in Arabidopsis. Larsen PB, Geisler MJ, Jones CA, Williams KM, Cancel JD; Plant J. 2005;41:353-363. PMID:15659095