Fig. 1

Electrophoresis of the PCR products for detection of the dup c.428–451 (24 pb) in exon 2 of the ARX gene in the affected male compared with the control (T+). A1-A6: males patients with XLID; Ladder: DNA 1000 Ladder; T+: Control (positive dup c.428–451 (24 pb). None c.428-451dup (24 pb) was found in our milder NS-ID patients