Activator in a reaction-diffusion system
= Activator in a reaction-diffusion system
= Activator
{synonym}
An activator in an activator-inhibitor <reaction–diffusion system> is a species whose local feedback enhances activation. Near a homogeneous equilibrium, positive self-feedback is reflected in the corresponding diagonal entry of the reaction <Jacobian matrix>. Cross-coupling to an <inhibitor> and differing diffusion rates can generate a <Turing instability>.