MAPT and tauopathy: Longer polyarginine peptides (R32 to R96) were demonstrated by Nadimidla et al. (2017) to inhibit the aggregation of both PHF6 and the PHF6*-containing amyloidogenic tau fragment GKVQIINKLDL, as well as aggregation of the full-length mutant tau protein P301L, which is found in human tauopathies (Cosacak et al., 2017).