The pedigrees of the 6 Tunisian families showing the inheritance of the 1364C>A mutation. The haplotypes containing the mutation are boxed. We note the same founder haplotype for Families 1, 2, 3 and 4. Families 5 and 6 had the same mutation but not the same haplotype. With the fkrp 52 all families shared the same founder allele (120 bp) transmitted with the Tunisian mutation.