Parallel and Series Reversible Reactions

Consider the case of a reversible reaction whose products lead to another product  

The net rate of the first reversible reaction can be given as rmt i = kl Ca Cb — k2 Cd Ce. The second reaction is in series with the first and we find it has kinetics that are given by r = k3 Cd Ce. It is irreversible. The third reaction, A to G, is parallel to that of the first reaction and it too is reversible. This reaction is second order in the forward direction and first order in the reverse direction. 

---