3DMTR intra-receptor score of GRIN1/2A. (A) Scatter plots of the GRIN1 (A₁) and GRIN2A (A₂) 3DMTR (intra-receptor) score. (Below) Raster plots of each subunit's 1DMTR, 3DMTR intra-subunit, and the 3DMTR intra-receptor scores. (*) Primary differences between the intra-subunit and intra-receptor 3DMTR scores. (B) Structural heatmap views showing the 3DMTR (intra-receptor) score on the full receptor (B₁), a top down view of the four isolated NTDs of the receptor (B₂), a side view of one NTD dimer (B₃); one of the GRIN1 (B₄) and GRIN2A (B₅) subunits are shown in isolation. All raster plots and structural heatmaps use the same color bar, shown at the top right of B₅.