Table 1. Sequence variations found in the TARDBP gene in the 279 ALS cases, 806 North American controls and 173 African samples.

Exon	Variant	Number of ALS cases	Number of controls	Origin of samples
2	p. A66A	5	8	1 African (Bedouin) 12 Caucasian
2	p. D65E	0	1	African (Yoruba)
3	p. A90V	0	2	Caucasian
5	p. P225P	0	4	African (1 Biaka Pygmies; 2 Mandenka; 1 Yoruba)
6	p. N352N	0	5	African (4 San; 1 Bantu)