Non‐Hydrolytic β‐Lactam Antibiotic Fragmentation by l,d‐Transpeptidases and Serine β‐Lactamase Cysteine Variants by Lohans, C, Chan, H, Malla, T, Kumar, K, Kamps, J, McArdle, D, Van Groesen, E, De Munnik, M, Tooke, C, Spencer, J, Paton, R, Brem, J, Schofield, C