TABLE 3.
Parameters of IP3 metabolism model
| Vmphos | Maximum rate of 5-phosphotase | 0.02 μM/s |
| KMphos | Michaelis constant of 5-phosphotase | 30.0 μM |
| Vmkin1 | Maximum rate of Ca2+-free form of 3-kinase | 0.002 μM/s |
| KMkin1 | Michaelis constant of Ca2+-free form of 3-kinase | 2.5 μM |
| Vmkin2 | Maximum rate of Ca2+-bound form of 3-kinase | 0.007 μM/s |
| KMkin2 | Michaelis constant of Ca2+-bound form of 3-kinase | 0.4 μM |
| dkin | Dissociation constant of Ca2+ binding site on 3-kinase | 0.1 μM |
| DI | IP3 diffusion constant | 300 μm2/s |
| Iss | Basal concentration of IP3 | 0.12 μM |
| Jmax | Maximum IP3 production rate at fertilization site | 0.06 M/s |