Local translation in neurons is mediated in part by the reactivation of stalled polysomes. However, the mechanism for stalling of the polysomes is not understood. https://www.biorxiv.org/content/10.1101/2021.02.22.432349v1.full.pdf Electron micrograph of negatively stained pellet preparation from rat brain, containing compacted stalled polysomes from Anadolu et al. bioRxiv https://doi.org/10.1101/2021.02.22.432349. The data supports a model in which specific sequences in mRNA