These genomic probes except P2 were generated by PCR amplification from genomic DNAs and are located close to the CpG island of CYFIP1 (P1), the 3'-end of the UBE3A gene (P3), the CpG island of ATP10A (P4), and the CpG island of the P locus for albinism. This evidence concerns the gene CYFIP1 and albinism.