EWSR1 and sarcoma: Among the PAR-associated LCD-containing proteins were the IDPs FUS/TLS (fused in sarcoma/translocated in sarcoma), EWS (ewing sarcoma), TAF15 (TATA box-binding protein-associated factor 68 kDa) (collectively abbreviated as FET proteins, also referred to as the TET family of proteins) and a number of heterogenous nuclear ribonucleoproteins (hnRNPs; Supplementary Data 2).