We return to processes in A and A-1, where the stabilising factors affecting the reactants and products would be expected to impact the energy of the transition state proportionately to their influence on the geometry of the transition state. From the previous explored constraints, this influence must be dependent on the energy of the minima, consequently coupling the energy of the TS to those of the intermediates. Ultimately, an exponential dependence on energy can be expected, as it is found in analogous questions such as transition probabilities, rate constants and other aspects in non-equilibrium transition state theory This would be derived from the energy difference not unlike a Boltzmann distribution, albeit with a different scaling parameter to inverse temperature (as it would not necessarily involve the rates of reaction). For an isodromic reaction set (A), in which the reactants and products are of the same nature, any changes in energy on either of the minima would result in an identical equal response on the transition state (TS). Drawing an analogy to microscopic reversibility, as the forward and backward factor transmission influences constitute the total origin of all factors acting on the TS from either minimum, they must add to 1. This can be expressed as a normalised sum of exponentials, where θ is a reaction-specific scaling factor (analogous in function to inverse temperature in kinetics) related to the responsiveness of the barrier (Equation ):