Fig 6. Dynamics of the model featuring the CatSper+NHE module.

The state space is {S, R_F, R_H, R_L, G,$f_{\text{kn}}^o$,$f_{\text{hc}}^o$, V, $f_{\text{cs}}^o$,$f_{\text{nh}}^a$, C, H}. As in Fig 4, the initial stimulus is S(0) = 25 nM, and the graphs are the numerical solutions for the indicated variables and intermediate quantities, obtained with the parameters listed in Table 2.