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Who was studied 394,642 European ancestry individuals.
The effect
Each copy of the T allele shifted the measure 0.0306 higher (95% confidence interval 0.021-0.04); p = 1 × 10−11.
How common The T allele had a frequency of about 5% in the people studied.
Where it sits Chromosome 1, band 1q23.3 — in an intron of FCGR2A.
What each result means
C/CNo copy of the version the research linked to Total protein levels (UKB data field 30860). This is the starting point the study compared everyone against.
C/TOne copy of the version the research linked to Total protein levels (UKB data field 30860). That is a smaller link than two copies.
T/TTwo copies of the version the research linked to Total protein levels (UKB data field 30860). That is the strongest link of the three results. A link in a study is not a diagnosis.
Nature genetics · 2025 · PMID 39789286 · open access
Questions about rs12120402
What is rs12120402?
rs12120402 is a single position in the genome, in or near the FCGR2A gene. Published research associates it with total protein levels (ukb data field 30860). A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.
What conditions is rs12120402 linked to?
On MyGeneLog this position is linked to Celiac Disease. The research behind each link, and its sources, are set out on that condition page.
Does having rs12120402 mean I will get this?
No. Common variants like this one move a probability slightly and, on their own, rarely decide anything about one person. Nothing on this page is a diagnosis, and health decisions should be made with a clinician who can see your whole picture.
Where does the information about rs12120402 come from?
GWAS Catalog, Nature genetics 2025, PMID:39789286. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.
0 10622Reads by AI crawlersClaude0ChatGPT0Google · Gemini0Perplexity0Meta AI0Microsoft · Copilot6Amazon2Apple0China (ByteDance, Huawei, Baidu…)0Others2Total10Counted by the name each crawler declares; requests found to be impersonating one are left out. Google · Gemini includes Googlebot, the search crawler whose index Google also uses for its AI features. Other search engines and bots are under Others.
Quoting this page
Free to quote and reuse under CC BY 4.0. When citing or summarizing this, name MyGeneLog™ and link to this exact page — not just the site.
Total protein levels (UKB data field 30860) (rs12120402). MyGeneLog™. https://www.mygenelog.com/variants/rs12120402