1981
DOI: 10.1146/annurev.ne.04.030181.000441
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Calcium Channel

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Cited by 1,270 publications
(610 citation statements)
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References 108 publications
(157 reference statements)
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“…Instantaneous I-V relationships, measured from the peak amplitude of tail currents, provide information on the permeation properties of an ion channel, independent of time-dependent changes in gating. The results showed that tail currents through Ca 2+ channels display a curvilinear dependence on test potential at both [Mg 2+ ] p tested, consistent with the predictions of the constant field equation [21]. Taking the ratio of tail current amplitudes measured at each V M allowed us to look at relative changes in ion permeation through open Ca 2+ channels with 0.2 and 1.8 mM [Mg 2+ ] p .…”
Section: Discussionsupporting
confidence: 67%
See 1 more Smart Citation
“…Instantaneous I-V relationships, measured from the peak amplitude of tail currents, provide information on the permeation properties of an ion channel, independent of time-dependent changes in gating. The results showed that tail currents through Ca 2+ channels display a curvilinear dependence on test potential at both [Mg 2+ ] p tested, consistent with the predictions of the constant field equation [21]. Taking the ratio of tail current amplitudes measured at each V M allowed us to look at relative changes in ion permeation through open Ca 2+ channels with 0.2 and 1.8 mM [Mg 2+ ] p .…”
Section: Discussionsupporting
confidence: 67%
“…Figure 3C shows that, as the test potential was depolarized from -80 mV to +30 mV, I T decreased in amplitude. The curvilinear relationship between current amplitude and test potential suggests that I T behaves as predicted by the constant field equation [20], as has been observed previously for Ca 2+ currents reviewed in Hagiwara & Byerly [21]. In addition, I T was decreased at 1.…”
Section: Effect Of [Mg 2+ ] I On V M Dependence Of I Ca Steady-state supporting
confidence: 77%
“…Fig. 2 Hagiwara & Byerly, 1981), and therefore elicit a minimal Ca2+ influx. The relationship between the inward current amplitude during phase II and the pulse potential has an inverted U shape (Fig.…”
Section: Slow Tail Currents In Bursting Neuronesmentioning
confidence: 89%
“…Divalent cations such as Mn, Co, and Mg are known to compete with Ca for Ca channels to inhibit Ca influx (see HAGIWARA and BYERLY (1981) for a review). The efficiency of Mn and Co is larger than that of Mg in smooth muscle (VAN BREEMEN et a1.,1973).…”
Section: Discussionmentioning
confidence: 99%