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Too bad the article didn't mention the specific SNP.

rs10784502

"In addition, the C allele of rs10784502 is associated, on average, with 9,006.7 mm3 larger intracranial volume, or 0.58% of intracranial volume per risk allele and is weakly associated with increased general intelligence by approximately 1.29 IQ points per allele."

http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.2250....

[Edited to provide a more useful quote]

Just tried and at 23andme it is possible to check this gene, at least with the latest version of their chip (v3). Just got to "Browse raw data" and put "rs10784502" on the right of "a SNP:" and press "Go".

p.s. CT here, the most diffuse variant (the "best" one according to the article is CC).

Where is the "Browse raw data" link?

Edit: Ignore that, found it. Under the Account menu in the top nav.

"No SNPs matching 'rs10784502' found in the data from your chip."

According to the abstract on the Nature Genetics paper, they were looking at this SNP in HMGA2: http://www.ncbi.nlm.nih.gov/projects/SNP/snp_ref.cgi?rs=1078...

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