Both control and FXS hiDFP-derived neurons exhibited colocalized expression of vGLUT1 with TUJ1 (Figure 7A), with 84.12% ± 1.68% of TUJ1+ control neurons co-expressing vGLUT1 and 86.64% ± 2.54% of FXS lines exhibiting vGLUT1+/TUJ1+ neurons (Figure 7C). Here, SLC17A7 is linked to fragile X syndrome.