An on-demand, drop-on-drop method for studying enzyme catalysis by serial crystallography by Butryn, A, Simon, PS, Aller, P, Hinchliffe, P, Massad, RN, Leen, G, Tooke, CL, Bogacz, I, Kim, I-S, Bhowmick, A, Brewster, AS, Devenish, NE, Brem, J, Kamps, JJAG, Lang, PA, Rabe, P, Axford, D, Beale, JH, Davy, B, Ebrahim, A, Orlans, J, Storm, SLS, Zhou, T, Owada, S, Tanaka, R, Tono, K, Evans, G, Owen, RL, Houle, FA, Sauter, NK, Schofield, CJ, Spencer, J, Yachandra, VK, Yano, J, Kern, JF, Orville, AM