Acknowledgments
This work was supported by the UK Engineering and Physical Sciences Research Council (EPSRC) Industrial Doctorate Training Centre (IDTC) in Bioprocess Engineering Leadership (Grant Number: EP/L01520X/1). H.P. would like to thank Anne de Lamotte (UCL) for providing the mixing time image processing software, Ignacio Montes Serrano (BOKU) for help with the mixing studies and GSK for providing the stable cell line as well as access to their facilities for conducting all experiments.