A) Images comparing HeLa cells transfected with non-targeting oligo, siSMN oligo pool, wild type (WT) rescue construct, and mutant rescue constructs. Grayscale bar given in analog-digital units. Scale bar= 10 μm. B) Quantification of SMN-containing MLOs per nucleus in each condition shown in (A). Kruskal-Wallace test for multiple comparisons, p = 2.19 (10−12) C) Quantification of SMN condensate radius given in pixels for each condition shown in (A). Kruskal-Wallace test for multiple comparisons, p = 9.33 (10−15). D) Integrated fluorescence intensity of labeled SMN in cells for each condition, units given as analog-digital units (ADU). Individual samples were compared with Dunn’s post hoc analysis and indicated as not significant (n. s.) where p > 0.05 and **** where p < 0.0001.