FIGURE 4:

N-WASP proline-rich domains are not required for processive elongation. (A–D) Conditions as in Figure 2, except nanofibers coated with GST-WWCA. (A, B) Elongation of untethered (A) or tethered filaments (B) in 1 μM actin and 1 mM Mg²⁺. (C, D) Elongation of untethered (C) or tethered filaments (D) in 1 μM actin 10 mM Mg²⁺. Growth rates shown in Table 1.