Covalent penicillin-protein conjugates elicit anti-drug antibodies that are clonally and functionally restricted by Deimel, LP, Moynié, L, Sun, G, Lewis, V, Turner, A, Buchanan, CJ, Burnap, SA, Kutuzov, M, Kobras, CM, Demyaneko, Y, Mohammed, S, Stracy, M, Struwe, WB, Baldwin, AJ, Naismith, J, Davis, BG, Sattentau, QJ