The mechanism by which phospholipids are transported across the cell envelope in a double-membraned bacteria is unknown, but recent cryo-EM results show the structure of the ABC exporter MlaFEDB responsible for this transport. Structural results provide mechanistic insight into the function of this exporter family. Citation: “Structure of MlaFEDB lipid transporter reveals an ABC exporter fold and two bound phospholipids"  Nicolas Coudray, Georgia L Isom, Mark R. MacRae, Mariyah N. Saidudden, Gira Bhabha, Damian C. Ekiert. (2020)