  Electric circuits manipulate electric charge and magnetic flux via a small
set of discrete components to implement useful functionality over continuous
time-varying signals represented by currents and voltages. Much of the same
functionality is useful to biological organisms, where it is implemented by a
completely different set of discrete components (typically proteins) and signal
representations (typically via concentrations). We describe how to take a
linear electric circuit and systematically convert it to a chemical reaction
network of the same functionality, as a dynamical system. Both the structure
and the components of the electric circuit are dissolved in the process, but
the resulting chemical network is intelligible. This approach provides access
to a large library of well-studied devices, from analog electronics, whose
chemical network realization can be compared to natural biochemical networks,
or used to engineer synthetic biochemical networks.
