假设GluN1 (GRIN1)与GluN2A (GRIN2A)和GluN2D (GRIN2D)形成三异四聚体。四聚体包括两个GluN1分子、一个GluN2A分子和一个GluN2D分子(Dunah et al. 1998)。GluN1:GluN2A:GluN2D (GRIN1:GRIN2A:GRIN2D)三异质四聚体的四聚体结构被认为是遵循Xenopus GluN1:GluN2A:GluN2B NMDA受体的低温电镜结构(Lu et al. 2017)。
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