Structures of an MHC class I molecule from B21 chickens illustrate promiscuous peptide binding. by Koch, M, Camp, S, Collen, T, Avila, D, Salomonsen, J, Wallny, H, van Hateren, A, Hunt, L, Jacob, J, Johnston, F, Marston, D, Shaw, I, Dunbar, P, Cerundolo, V, Jones, E, Kaufman, J