EWSR1 and tauopathy: Interestingly, the third group of proteins whose association with tau increased in the 2.5 m mice was nucleotide binding proteins; these include RBPs such as EWSR1, TAF15 and HNRNPA0, which we previously reported to co-localize with tau pathology in the rTg4510 model of tauopathy [37] (Fig. 2a, b).