Parameters often are tuned with metabolite concentration time series data to build a dynamic model of metabolism. However, such tuning may reduce the extrapolation ability (generalization capability) of the model. In this study, we determined detailed kinetic parameters of three purified Escherichia coli glycolytic enzymes using the initial velocity method for individual enzymes; i.e., the parameters were determined independently from metabolite concentration time series data. The metabolite concentration time series calculated by the model using the parameters matched the experimental data obtained in an actual multienzyme system consisting of the three purified E. coli glycolytic enzymes. Thus, the results indicate that kinetic parameters can be determined without using an undesirable tuning process.

An induced-current-generated system using the nonequilibrium phenomena of water, nitrobenzene, and trimethylstearylammonium chloride is proposed. A nitrobenzene droplet spontaneously carried a small magnet around a coil, resulting in the induced current. Incidentally, we observed that the spontaneous rotation occurred without any contact with a glass substrate.Spontaneous oscillation at liquid/liquid interfaces under isothermal conditions has been actively studied for the understanding of nonequilibrium systems and the construction of new chemomechanical transductions.