Interestingly, in double‐mutant mice carrying the epilepsy‐causing Kcna1–/– mutation in addition to another epileptogenic mutation in the P/Q‐type calcium channel gene Cacna1a (Cacna1atottering), epilepsy was mutually suppressed (Glasscock et al., 2007). The gene discussed is CACNA1A; the disease is epilepsy.