Fig. 6

A model with an unbounded fast variable. a The trajectories of the full model (Eq. 21) and the reduced deterministic model (Eq. 22) during the IT period are the same for the same initial values of normalized M(0) by the steady state of M (α _M /k _M ) when α _M =1,α _P =10 and when α _M =10,α _P =1. The difference between the trajectories increases as M(0) decreases. Here, k _M =1,k _P =0.1. b When α _M =1,α _P =10, fluctuation in the normalized M by its steady state is larger than for α _M =10,α _P =1. c When k _P =0.01, the relative differences between the trajectories of the full and reduced deterministic model during the IT period are smaller than when k _P =0.1 (c.f. panel a)