rs3813948
A SNP in the C4BPB gene on chromosome 1. Its most notable genotype is T;T: common in clinvar
- Gene
- C4BPB
- Location
- Chr 1207,096,513 (GRCh38)
- Highest magnitude
- 0.0Typical
- Tested on
- 23andMe, AncestryDNA
- Minor allele frequency
- 12%
Genotypes
Plus strand, as in 23andMe and AncestryDNA files.
SNPedia records rs3813948 on the minus strand: (A;A). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.
Frequency
Share of each genotype in 8 HapMap populations.
- AverageT;T 74%
- European ancestry (Utah)T;T 80%
- Han Chinese (Beijing)T;T 67%
- Japanese (Tokyo)T;T 74%
- Yoruba (Nigeria)T;T 62%
- Gujarati IndianT;T 78%
- Luhya (Kenya)T;T 67%
- Mexican ancestry (Los Angeles)T;T 84%
- TuscanT;T 83%
Source and license
Adapted from rs3813948 on SNPedia, using a snapshot taken October 16, 2026. SNPedia content is shared under CC BY-NC-SA 3.0 US, and this page is shared under the same license.
SNPedia is a community-edited wiki. Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice. Magnitude is a community rating of how interesting a genotype is, not a risk score.