Interactions of hydrolyzed β-lactams with the L1 metallo-β-lactamase: Crystallography supports stereoselective binding of cephem/carbapenem products di Hinchliffe, P, Calvopiña, K, Rabe, P, Mojica, MF, Schofield, CJ, Dmitrienko, GI, Bonomo, RA, Vila, AJ, Spencer, J