Table 1

GJB2 mutations in Indian probands with prelingual, bilateral hearing loss

HomozygotesHeterozygotesCompound heterozygotes
MutationEffectFamilialSporadicFamilialSporadicFamilialSporadicAllele frequency among deaf
Ivs1(+1)G→ANo transcript0000100.002
71G→AW24X28832100.181
231G→AW77X1000000.005