This is an excellent idea. We have added an additional (final) main text figure, Fig. 7, illustrating how the molecular defects could converge on similar NMDA-EPSCs. We have explained the model in the accompanying figure legend with reference to supporting evidence in other figures.
The abstract now reads as follows: GRIN2B mutations are rare but often associated with patients having severe neurodevelopmental disorders, including a varying range of symptoms such as intellectual disability, developmental delay and epilepsy.