Figure 2. Dominant time constant τ_D is reversibly increased in low Ca²⁺.

(A–C) Mouse ERG flash responses at 25°C in normal Ringer (A and C) and in 25 nM free Ca²⁺ (B). Flash strengths were 173, 548, 1100, 1730, 3460, 5480, (11 000, only in B) Rh*. Data used for τ_D determinations are indicated by horizontal lines. (D) Pepperberg plots extracted from A–C: τ_D was 383 ms before (▪) and 382 ms after (□) low Ca²⁺ (25 nM) exposure. In low Ca²⁺ τ_D was 710 ms (red ○).