Figure 4.

Strain and number of myosin motors

A and B, relation between Δs (the difference between s at any V and the isometric s) and either V (log scale, A) or T (B). C and D, relation between the number of myosin motors relative to the isometric control value (f) and either V (log scale, C) or T (D). Open symbols, control; filled symbols, 10 mm P_i. Different symbols indicate different velocity ranges: triangles, V ≤ 350 nm s⁻¹; circles, V > 350 nm s⁻¹. Lines, simulated relations: dashed, control; dotted, 10 mm P_i. The continuous line in C is the direct proportionality line. Data are means ± SEM.