​​The Major "T" allele is associated with:

  • The T (major) allele has been associated with lower DBH activity and thus higher dopamine levels than the C (minor) allele (R).

This SNP is associated with (unknown which allele):

  • Blood DBH activity (2% higher than other SNPs) (R).
  • An over transmission of paternal alleles associated with ADHD (R).
  • ADHD (R).
  • substance use disorders (R).


Parent Gene: DBH

Importance: 2
Less common allele: C = 30%
More common allele: T = 70%
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