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. 2012 May 27;38(3):465–496. doi: 10.1007/s10867-012-9267-7

Table 5.

Parameters used for astrocyte Ca2 +  dynamics

Symbol Description Value Reference
Inline graphic 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]
Inline graphic CaInline graphicaffinity of PKC 0.6 μM [30]
Glutamate-independent IP3 production
νδ Maximal rate of IP3 production by PLCδ 0.05 μM s − 1 [30]
Inline graphic Ca2 +  affinity of PLCInline graphic 0.1 μM [30]
Inline graphic Inhibition constant of PLCInline graphic activity 1.5 μM [30]
IP3 degradation
r5pa Maximal rate of degradation by IP-5P 0.05 s − 1 [30]
νK 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]