Fig. 3. Distributions of the microtubule sliding patterns (Pattern) and the doublet present at the dynein-exposed edge of the active area (Doublet Number) following the induction of microtubule sliding in low (dark bars) and high (light bars) Ca²⁺ buffer. For microtubule sliding pattern data: cpc1 low Ca²⁺: 3 trials, n=143; high Ca²⁺: 3 trials, n=84; pf6 low Ca²⁺: 3 trials, n=125; high Ca²⁺: 4 trials, n=90; pf14 low Ca²⁺: 4 trials, n=105; high Ca²⁺: 4 trials, n=95; pf17 low Ca²⁺: 3 trials, n=64; high Ca²⁺: 3 trials, n=50. For doublet number data: cpc1 low Ca²⁺: 3 trials, n=46; high Ca²⁺: 3 trials, n=42; pf6 low Ca²⁺: 3 trials, n=65; high Ca²⁺: 3 trials, n=19; pf14 low Ca²⁺: 4 trials, n=52; high Ca²⁺: 4 trials, n=32; pf17 low Ca²⁺: 3 trials, n=20; high Ca²⁺: 3 trials, n=13.