TARDBP and frontotemporal dementia: Phosphorylation on S409/S410 is a highly specific and consistent feature of aggregated TDP‐43 in all ALS/FTD subtypes (Inukai et al, 2008; Neumann et al, 2009), and five phosphorylation sites (S379, S403, S404, S409 and S410) were detected with phosphorylation site‐specific antibodies in human post‐mortem tissue (Hasegawa et al, 2008).