Comparison of different eukaryotic cell-free expression systems with the tobacco BY-2 cell-free lysate (BYL). Cell-free reaction modes (coupled batch or continuous feeding of substrates and removal of inhibitory byproducts by dialysis) are indicated. The data represent the highest protein yields reported for each system including the information which target protein has been used to determine maximum product levels and are sourced from the following references and company information: rabbit reticulocyte lysate (RLL, luciferase) (promega.de), Pichia pastoris yeast extract (YeE, human serum albumin) (Aw and Polizzi, 2018), CHO cell extract (luciferase) (Brodel et al., 2014), Spodoptera frugiperda insect cell extract (ICE, procaspase 3) (promega.de), HeLa cell extract (HCE, model protein not indicated) (thermofisher.com), wheat germ extract (WGE, model protein not indicated) (biotechrabbit.com), Leishmania tarentolae extract (LTE, eGFP) (jenabioscience.com), HCEd (model protein not indicated) (thermofisher.com), CHOd (epidermal growth factor-eYFP fusion), and WGEd (model protein not indicated) (biotechrabbit.com), and BYL (eYFP).