Table 5.
Parameters used for astrocyte Ca2 + dynamics
| Symbol | Description | Value | Reference |
|---|---|---|---|
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Maximal IP3R flux | 6 s − 1 | [30] |
| rL | Maximal rate of Ca2 + leak from ER | 0.11 s − 1 | [30] |
| c0 | Total cell free Ca2 + concentration | 2 μM | [30] |
| c1,a | Ratio of ER volume to cytosol volume | 0.185 | [30] |
| νER | Maximal rate of SERCA uptake | 0.9 μM s − 1 | [30] |
| KER | SERCA Ca2 + affinity | 0.1 μM | [30] |
| d1 | IP3 dissociation constant | 0.13 μM | [30] |
| d2 | Ca2 + inactivation dissociation constant | 1.049 μM | [30] |
| d3 | IP3 dissociation constant | 0.9434 μM | [30] |
| d5 | Ca2 + activation dissociation constant | 0.08234 μM | [30] |
| a2 | IP3R binding rate for Ca2 + inhibition | 2 s − 1 | [30] |
| N | Number of IP3Rs in a cluster | 20 | [60] |
| Glutamate-dependent IP3 production | |||
| νβ | Maximal rate of IP3 production by PLCbeta | 0.5 μM s − 1 | [30] |
| KR | Glutamate affinity of the receptor | 1.3 μM | [30] |
| Kp | Ca2 + /PKC-dependent inhibition factor | 10 μM | [30] |
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Ca affinity of PKC |
0.6 μM | [30] |
| Glutamate-independent IP3 production | |||
| νδ | Maximal rate of IP3 production by PLCδ | 0.05 μM s − 1 | [30] |
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Ca2 + affinity of PLC
|
0.1 μM | [30] |
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Inhibition constant of PLC activity |
1.5 μM | [30] |
| IP3 degradation | |||
| r5pa | Maximal rate of degradation by IP-5P | 0.05 s − 1 | [30] |
| ν3 K | Maximal rate of degradation by IP3-3K | 2 μM s − 1 | [30] |
| KD | Ca2 + affinity of IP3-3K | 0.7 μM | [30] |
| K3 | IP3 affinity of IP3-3K | 1 μM | [30] |






