Crystal Structures of Penicillin-Binding Proteins 4 and 5 from Haemophilus influenzae - Kawai, F; Clarke, TB; Roper, DI; Han, G-J; Hwang, KY; Unzai, S; Obayashi, E; Park, S-Y; Tame, JRH (Journal of Molecular Biology, 2010)