This protocol describes an efficient methodology for the extraction and quantification of caffeine in cell suspensions of C. arabica L. and an experimental process for evaluating the enzymatic activity of caffeine synthase with the expression level of the gene that encodes this enzyme.
Pech-Kú, R., Muñoz-Sánchez, J. A., Monforte-González, M., Vázquez-Flota, F., Rodas-Junco, B. A., Hernández-Sotomayor, S. T. Caffeine Extraction, Enzymatic Activity and Gene Expression of Caffeine Synthase from Plant Cell Suspensions. J. Vis. Exp. (140), e58166, doi:10.3791/58166 (2018).