These include protein deposits in pathological conditions such as FUS and other prion-like RNA-binding proteins (RBPs) in amyotrophic lateral sclerosis (ALS) and Frontotemporal dementia (FTD) (reviewed in 5), as well as condensates that perform their normal cellular function in a solid-like state, such as centrosomes (8), nuclear pores (9) and oskar ribonucleoprotein granules (10). Here, FUS is linked to amyotrophic lateral sclerosis.