rs121912981
A SNP in the ALAD gene on chromosome 9. Its most notable genotype is C;T: Carrier of an ALAD deficiency porphyria mutation
- Gene
- ALAD
- Location
- Chr 9113,389,085 (GRCh38)
- Highest magnitude
- 3.0Important
- Tested on
- AncestryDNA
Genotypes
Plus strand, as in 23andMe and AncestryDNA files.
- C;TMost notableBadCarrier of an ALAD deficiency porphyria mutation
- C;CGoodcommon in clinvar
SNPedia records rs121912981 on the minus strand: (A;G), (G;G). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.
Related
Other ALAD SNPs
- rs1800435C;GCarrier of an ALAD deficiency porphyria mutationImportant
- rs121912980C;TCarrier of an ALAD deficiency porphyria mutationImportant
- rs121912982A;GCarrier of an ALAD deficiency porphyria mutationImportant
- rs121912983C;TCarrier of an ALAD deficiency porphyria mutationImportant
- rs749066913A;GCarrier of an ALAD deficiency porphyria mutationImportant
Notes
From SNPedia
Notes
C;T
Unaffected in absence of a second mutation in the ALAD gene; see links via main rs-page and the ALAD gene page
Source and license
Adapted from rs121912981 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.