The two non-ion-channel genes, LGl1 causing autosomal dominant lateral temporal lobe epilepsy and MASS1 causing febrile and afebrile seizures, both contain a novel repeat motif variously called the epilepsy-associated repeat (EAR) and epitempin (EPTP) repeat.
Two apparent exceptions to this rule are the MASS1 gene, which is mutated in the Frings mouse model of audiogenic epilepsy, and the LGI1 gene, which is mutated in autosomal dominant partial epilepsy with auditory features (ADPEAF).