Table 2. Comparison of DYX1C1 cDNA between human and four nonhuman primates.

Exon	Nucleic acid change	Amino acid change	Chimpanzee	Pygmy chimpanzee	Gorilla	Orangutan
1	None
2	6T → C		+	+	+	+
2	47C → T	A16V			+
2	48G → C		+
2	107C → T	T36M	+
3	None
4	284T → C	M95T				+
4	384C → T		+	+	+	+
5	473C → A	A158E	+	+	+	+
5	516A → C	Q172H				+
5	520A → G	K174E			+
5	540A → G				+
5	572G → A	G191E	+	+	+	+
5	583A → T	I195L			+	+
5	591T → C					+
5	611T → C	L204S				+
5	624T → C					+
6	639G → A					+
7	789A → G			+
8	909G → A		+	+	+	+
9	None
10	None

Nucleic acid and amino acid changes are shown for each exon of DYX1C1 in comparison to the human sequence; + indicates the presence of a change in a nonhuman species.