  We report the first study of a network of connected enzyme-catalyzed
reactions, with added chemical and enzymatic processes that incorporate the
recently developed biochemical filtering steps into the functioning of this
biocatalytic cascade. New theoretical expressions are derived to allow simple,
few-parameter modeling of network components concatenated in such cascades,
both with and without filtering. The derived expressions are tested against
experimental data obtained for the realized network's responses, measured
optically, to variations of its input chemicals' concentrations with and
without filtering processes. We also describe how the present modeling approach
captures and explains several observations and features identified in earlier
studies of enzymatic processes when they were considered as potential network
components for multi-step information/signal processing systems.
