rs1128503(A;G)

May require more methadone during heroin withdrawal

Magnitude
0.0Typical
Repute
Bad
Frequency
41%Average of 11 populations
On SNPedia
rs1128503(C;T)Minus strand
Gene
ABCB1

Frequency

Share of people with A;G in each HapMap population.

  • Mexican ancestry (Los Angeles)59%
  • European ancestry (Utah)57%
  • Gujarati Indian55%
  • Japanese (Tokyo)48%
  • Chinese (Denver)45%
  • Tuscan43%
  • Han Chinese (Beijing)38%
  • African ancestry (Southwest US)37%
  • Maasai (Kenya)24%
  • Yoruba (Nigeria)23%
  • Luhya (Kenya)21%

Other genotypes of rs1128503

  1. G;GMost notableNot ratednormalTypical · 0.039% of people
  2. A;ABadlikely to require more methadone during heroin withdrawalTypical · 0.020% of people

All about rs1128503

Source and license

Adapted from rs1128503(C;T) 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.