In addition, we probed lysates from CHIR99021-treated SH-SY5Y neuroblastoma cells (Supplementary Fig. 4a–b) and iPSC-derived forebrain neurons (Supplementary Fig. 4c–d) with a second commercial TDP-43 antibody (Proteintech 10782-2-AP). Here, TARDBP is linked to neuroblastoma.