GENE	LOCUS or SYNDROME	AMINO ACID CHANGE	NUCLEOTIDE CHANGE	EXON	ETHNICITY (Number of families)	REFERENCES
PCDH15	Usher Syndrome, Type 1F		IVS27-2A>G		Pakistani (1)	Ahmed 2001
		R3X	7C>T	exon 2	Pakistani (1); Indian (1)	Ahmed 2001; Alagramam 2001
		X @ 419	1471delT	exon 10	Hutterite (1)	Alagramam 2001