Table I.

Parameters of RYR gating

Parameter HTG aHTG Comments 
KCa (µM) 1.36 0.6 Zahradník et al., 2005  
KMg (μM) 431 ± 12 79 ± 8 Fitted parameter 
fCa N/A 0.046 Zahradník et al., 2005  
fMg N/A 1.40 ± 0.05 Fitted parameter 
KO00 N/A 10,800 Zahradník et al., 2005  
KO40 0.00219 N/A Zahradník et al., 2005  
KOL 0.5 0.5 Zahradník et al., 2005  
KCL 0.0333 0.89 Zahradník et al., 2005  
KCI 3.0 3.0 Zahradník et al., 2005  
KI (μM) 760 760 Zahradníková et al., 2003  
[Mg] (mM) 1.0 1.0 Lukyanenko and Györke, 1999  
Parameter HTG aHTG Comments 
KCa (µM) 1.36 0.6 Zahradník et al., 2005  
KMg (μM) 431 ± 12 79 ± 8 Fitted parameter 
fCa N/A 0.046 Zahradník et al., 2005  
fMg N/A 1.40 ± 0.05 Fitted parameter 
KO00 N/A 10,800 Zahradník et al., 2005  
KO40 0.00219 N/A Zahradník et al., 2005  
KOL 0.5 0.5 Zahradník et al., 2005  
KCL 0.0333 0.89 Zahradník et al., 2005  
KCI 3.0 3.0 Zahradník et al., 2005  
KI (μM) 760 760 Zahradníková et al., 2003  
[Mg] (mM) 1.0 1.0 Lukyanenko and Györke, 1999  

The corresponding gating schemes are shown in the supplemental material. N/A, not applicable. KCa, calcium dissociation constant of the ion-free closed state C00. KMg, magnesium dissociation constant of the ion-free closed state C00. KO00, dissociation constant of the ion-free open state O00. KO40, dissociation constant of the open state O40. fCa, allosteric factor coupling calcium binding to channel opening. fMg, allosteric factor coupling magnesium binding to channel opening. KOL, dissociation constant of the L-mode open state OL. KCL, dissociation constant of the L-mode closed state CL. KCI, dissociation constant of the inactivated state I. KI, inhibitory constant of Mg2+ ions at the divalent inhibitory site. [Mg], free Mg2+ concentration.

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