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Stands on its own.
Nothing else here links to this position yet — but the page above is the point: what the
research found, what each genotype means, and where it came from, in language you can
read. Links to conditions, drugs and the senses appear automatically if we write them.
What the study found
Who was studied 406,516 European ancestry individuals.
The effect
Each copy of the C allele shifted the measure 0.184 higher (95% confidence interval 0.13-0.23); p = 2 × 10−12.
Where it sits Chromosome 7, band 7q21.12 — in an intron of GRM3-AS1.
What each result means
C/CTwo copies of the version the research linked to Mean corpuscular hemoglobin variance. That is the strongest link of the three results. A link in a study is not a diagnosis.
C/TOne copy of the version the research linked to Mean corpuscular hemoglobin variance. That is a smaller link than two copies.
T/TNo copy of the version the research linked to Mean corpuscular hemoglobin variance. This is the starting point the study compared everyone against.
Nature communications · 2025 · PMID 40335489 · open access
Questions about rs149875532
What is rs149875532?
rs149875532 is a single position in the genome, in or near the GRM3-AS1 gene. Published research associates it with mean corpuscular hemoglobin variance. A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.
Does having rs149875532 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 rs149875532 come from?
GWAS Catalog, Nature communications 2025, PMID:40335489. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.
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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.
Mean corpuscular hemoglobin variance (rs149875532). MyGeneLog™. https://www.mygenelog.com/variants/rs149875532