127
Variables and Constants | |
V |
Membrane voltage (mV) |
i |
Currents given in pA |
Cm = 35 ■ 10^3 nF
gc = 0.5 nS
9kx ~ 1∙5 ɪɪs |
Ekx = -74 mV |
9h = 2 nS gkυ = 0.5 nS |
Eh = -30 mV Ekv = -74 mV |
9leak — 0.2 nS 9ca = 2 nS Idark ~~ 50 pA |
Eieak = -55 mV Eca - 40 mV Photocurrent (from Hamer, 2000) |
F = (cG∕cGdarkffca R = Φ-(1∕tr)R È = υrp(R- (l∕τ⅛)E,) |
Normalizeddarkcurrentfraction Rhodopsin activation rate Phosphodiesterase activation rate |
cG = Amax∕(l + (c∕(Kcα)ncα) - cG(βdark + Eβff) cGMP activation rate
Outer Segment Calcium Concentration and BufferActivity
c = bJdF - 7c(c- cmm) - Cb Change in calcium concentration
Cb = ⅛ι(ei - cβ)c - ∕⅞<¾ Change in buffered calcium
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