{{Rsnum
|rsid=121908378
|Chromosome=7
|Orientation=plus
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Gene=FOXP2
|position=114642616
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|Gene_s=FOXP2
}}

[[rs121908378]], also known as Arg328Ter or R328X, is a C-to-T transition in exon 7 of the [[FOXP2]] gene. 

As a dominant mutation, [[rs121908378]](T) has been linked to developmental verbal dyspraxia.{{PMID|15877281}} The associated disorder is known as Speech-language disorder-1 or SPCH1.
{{omim
|id=605317
|rsnum=121908378
|variant=0002
}}{{ClinVar
|rsid=121908378
|Reversed=0
|FwdREF=C
|FwdALT=T
|REF=C
|ALT=T
|RSPOS=114282671
|CHROM=7
|dbSNPBuildID=133
|SSR=0
|SAO=1
|VP=0x050060000000000002110100
|GENEINFO=FOXP2:93986
|GENE_NAME=FOXP2
|GENE_ID=93986
|WGT=0
|VC=SNV
|CLNALLE=1
|CLNHGVS=NC_000007.13:g.114282671C>T
|CLNSRC=OMIM Allelic Variant
|CLNORIGIN=1
|CLNSRCID=605317.0002
|CLNSIG=5
|CLNCUI=CN032592
|CLNDBN=Speech-language disorder 1
|Disease=Speech-language disorder 1
|CLNACC=RCV000005372.1
|Tags=PM;OTHERKG;LSD;OM
|CLNDSDB=MedGen:OMIM:Orphanet
|CLNDSDBID=CN032592:602081:209908
}}