Increased cortical neuron nascent axon length, total neurite length, and neurite number due to increased GAP-43 protein expression upon hnRNP-Q1 knockdown. (A) Average nascent axon length, (B) total neurite length, and (C) neurite number of selected neurons from Figure 2 were quantified. n = 7, Scr + Scr: 62 out of 173 cells; Scr + GAP-43: 59 out of 181 cells; Q1 + Scr: 47 out of 170 cells; and Q1 + GAP-43: 145 out of 184 cells from seven independent experiments. One-way ANOVA, Tukey’s posthoc, nascent axon length p values: Scr + Scr vs. Scr + GAP-43, p = 0.8423; Scr + Scr vs. Q1 + Scr, p = 0.0004; Scr + Scr vs. Q1 + GAP-43, p = 0.5784; Scr + GAP-43 vs. Q1 + Scr, p < 0.0001; Scr + GAP-43 vs. Q1 + GAP-43, p = 0.9921; Q1 + Scr vs. Q1 + GAP-43, p < 0.0001; total neurite length p values: Scr + Scr vs. Scr + GAP-43, p = 0.9884; Scr + Scr vs. Q1 + Scr, p < 0.0001; Scr + Scr vs. Q1 + GAP-43, p = 0.2956; Scr + GAP-43 vs. Q1 + Scr, p < 0.0001; Scr + GAP-43 vs. Q1 + GAP-43, p = 0.5334; Q1 + Scr vs. Q1 + GAP-43, p < 0.0001; neurite number p values: Scr + Scr vs. Scr + GAP-43, p = 0.9707; Scr + Scr vs. Q1 + Scr, p = 0.0021; Scr + Scr vs. Q1 + GAP-43, p = 0.4028; Scr + GAP-43 vs. Q1 + Scr, p = 0.0098; Scr + GAP-43 vs. Q1 + GAP-43, p = 0.1699; Q1 + Scr vs. Q1 + GAP-43, p < 0.0001. (D–F) Cumulative distribution plots for each measurement of selected neurons from Figure 2.