Table I.

Rate constant and charge parameters of Kv channel gating models

Model Transitions α0 [s−1zα β0 [s−1zβ 
Zagotta et al. 1994 (Shaker channel) R1–R2 1,120 0.25 373 1.6 
 R2–A 2,800 0.32 21.2 1.1 
Schoppa and Sigworth 1994 (Shaker channel) S0–S1 1,650 0.47 450 0.52 1.3 
 S1–S2 4,900 0.08 960 0.52 
 S2–S3 7,920 0.08 1,560 0.52 
Piper et al. 2003 (hERG1 channel) S0–S1 1,000 0.2 1,500 0.04 
 S1–S2 150 0.15 280 0.05 1.5 
Standard model (hERG1 channel) fast (e.g., S0–S1296 0.43 2,683 0.076 
 slow (e.g., S4–S873 0.21 1.9 0.56 
Cd2+ model (hERG1 channel) fast (e.g., S0–S1563 0.27 2,329 0.23 
 slow (e.g., S4–S820.9 0.30 5.7 0.68 
Model Transitions α0 [s−1zα β0 [s−1zβ 
Zagotta et al. 1994 (Shaker channel) R1–R2 1,120 0.25 373 1.6 
 R2–A 2,800 0.32 21.2 1.1 
Schoppa and Sigworth 1994 (Shaker channel) S0–S1 1,650 0.47 450 0.52 1.3 
 S1–S2 4,900 0.08 960 0.52 
 S2–S3 7,920 0.08 1,560 0.52 
Piper et al. 2003 (hERG1 channel) S0–S1 1,000 0.2 1,500 0.04 
 S1–S2 150 0.15 280 0.05 1.5 
Standard model (hERG1 channel) fast (e.g., S0–S1296 0.43 2,683 0.076 
 slow (e.g., S4–S873 0.21 1.9 0.56 
Cd2+ model (hERG1 channel) fast (e.g., S0–S1563 0.27 2,329 0.23 
 slow (e.g., S4–S820.9 0.30 5.7 0.68 

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