Posttranslational Modifications of Tau (IMAGE) The Zuckerman Institute at Columbia University Caption Tau aggregation into insoluble filaments is the defining pathological hallmark of tauopathies. Arakhamia et al. use cryo-electron microscopy and mass spectrometry to compare the structures of tau filaments from corticobasal degeneration and Alzheimer's disease, identifying the importance of posttranslational modifications in mediating the structural diversity of tauopathy strains. Above: Tau filaments decorated with ubiquitin chains (yellow) from corticobasal degeneration (blue/navy) and Alzheimer's disease (red/purple) emanating from a neuron. Credit Veronica Falconieri Hays and Anthony Fitzpatrick/Columbia University's Zuckerman Institute Usage Restrictions Please contact Zuckerman Institute press office for reprint permissions. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.