Amara2013 - PCNA ubiquitylation in the activation of PRR pathway

Mechanistic model of the Post-Replication Repair (PRR), the pathway involved in the bypass
of DNA lesions induced by sunlight exposure and UV radiation. PRR acts through two different mechanisms,
activated by mono- and poly-ubiquitylation of the DNA sliding clamp, called Proliferating Cell Nuclear Antigen (PCNA).
This model has been defined according to the stochastic formulation of chemical kinetics [Gillespie DT, J Phys Chem 1977, 81(25):2340-2361],
which requires to specify the set of molecular species occurring in the pathway and their respective interactions,
formally described as a set of biochemical reactions.
The volume considered for this system is 1.666667e-17L; this value can be used to convert the model into the deterministic formulation.