1.Jiang X, Smirnova I, Kasho V, Wu J, Hirata K, Ke M, Pardon E, Steyaert J, Yan N, Kaback R. Crystal structure of a LacY-nanobody complex in a periplasmic-open conformation. Proc Natl Acad Sci U S A. 2016;113(44):12420–12425. PMCID: PMC5098631 Reference Link