GABRA2 and Dravet syndrome: Considering the importance of GABA signaling in epilepsy and reported dysfunction in GABAergic signaling in Dravet syndrome [14–16], Gabra2 was identified as the top candidate modifier gene at Dsm1. Expression of Gabra2 was significantly elevated in wildtype 129 mice compared to [129XB6]F1 mice (Fig 2B).