title: Type II ABC permeases: are they really so different?
abstract: Structural and biochemical data reported by Tirado-Lee et al. (2011) in this issue of Structure reveal the existence of high and low affinity ABC transporters for the same substrate in a single organism, thus raising questions about structural and mechanistic differences within the ABC superfamily.
authors.affiliation: School of Medical and Molecular Biosciences, University of Technology Sydney, P.O. Box 123, Broadway, New South Wales 2007, Australia. tony.george@uts.edu.au
authors.forename: Anthony M
authors.initials: AM
authors.lastname: George
authors.forename: Peter M
authors.initials: PM
authors.lastname: Jones