In mouse neurons, GluN1:GluN2B (Grin1:Grin2b) di-heteromers are transported to the plasma membrane from the endoplasmic reticulum (ER) via transport vesicles. At the membrane of transport vesicles, GluN1:GluN2b NMDA receptors associate with the complex of Lin7 (Lin7a, Lin7b or Lin7c), Cask and Apba1. The microtubule-associated kinesin motor protein Kif17 binds to the Lin7:Cask:Apba1 complex (Jo et al. 1999, Setou et al. 2000).