{{Rsnum
|rsid=28371706
|Gene=CYP2D6
|Chromosome=22
|position=42525772
|Orientation=plus
|ReferenceAllele=C
|MissenseAllele=T
|GMAF=0.04867
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Gene_s=CYP2D6
}}[[rs28371706]], also known as 1023C>T or T107I, is a SNP in the [[CYP2D6]] gene.

The [[rs28371706]](T) allele is found in several CYP2D6 variants:

* CYP2D6*17 decreased activity variant
* CYP2D6*40 non-functioning variant
* CYP2D6*58 variant
* CYP2D6*64 variant

{{PharmGKB
|RSID=rs28371706
|Name_s=CYP2D6:1023 C>T
|Gene_s=CYP2D6
|Feature=Exon/NonSyn
|Evidence=Web Resource:http://www.pharmgkb.org/search/annotatedGene/cyp2d6/variant.jsp#ImportantVariantInformationforCYP2D6-222
|Annotation=Variant was identified as being part of the reduced function haplotype CYP2D6*17.
|Drugs=
|Drug Classes=
|Diseases=
|Curation Level=In-Depth
|PharmGKB Accession ID=PA161145191
}}

{{PMID Auto
|PMID=18547414
|Title=Genotyping panel for assessing response to cancer chemotherapy.
|OA=1
}}

{{GET Evidence
|gene=CYP2D6
|aa_change=Thr107Ile
|aa_change_short=T107I
|impact=pharmacogenetic
|qualified_impact=Insufficiently evaluated pharmacogenetic
|inheritance=unknown
|quality_scores=Array
|dbsnp_id=rs28371706
|overall_frequency_n=648
|overall_frequency_d=10688
|overall_frequency=0.0606287
|n_genomes=8
|n_genomes_annotated=0
|n_haplomes=9
|n_articles=0
|n_articles_annotated=0
|in_pharmgkb=Y
|nblosum100=3
|autoscore=1
|webscore=N
}}

{{PMID Auto
|PMID=23133420
|Title=Pharmacogenomic Diversity among Brazilians: Influence of Ancestry, Self-Reported Color, and Geographical Origin.
|OA=1
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | FTDNA2}}
{{on chip | FTDNA}}