| Here we show by biochemical and atomic force microscopy analyses that NEEP 21 , a neuronal endosomal protein necessary for receptor recycling including AMPAR , is associated with the scaffolding protein GRIP 1 and the AMPAR subunit GluR 2 . 1.1177965^^^ Interactions between NEEP 21 , GRIP 1 and GluR 2 regulate sorting and recycling of the glutamate receptor subunit GluR 2 . 0.79399479^^^ |