Computational Functions in Biochemical Reaction Systems

Consider the biochemical reaction mechanism shown in fig. 4.8, which occurs in glycolysis [7] note the similarity in the structure of this mechanism to that of a model of a chemical neuron shown in fig. 4.1. Calculations of the stable stationary states of the biochemical system of fig. 4.8 are plotted in fig. 4.9. The change from high to low concentration of either compound is not as abrupt as that in fig. 4.2 for the chemical model, but is clearly present. We have identified a computational element, a fuzzy chemical neuron, in a biochemical reaction. 

Logic gates can be constructed by a variety of chemical reaction mechanisms for example, relatively simple enzymatic reactions can serve as logic gates [7]. Another important unit consists of cyclic enzymatic reactions, as shown in fig. 4.10. This system is present in glycolysis. We single it out since measurements on its stationary states away from equilibrium have been made and compared with calculations [9]. The experiments 

For another implementation of electronic devices by means of macroscopic kinetics we mention the construction of frequency filters and signal processing [14], but do not explore this subject further. 

6-phosphate/fructose 1,6-bisphosphate interconversion cycle. J. Phys. Chem. B 1997,101, 3872-3876. 

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