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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Sptbn2+
wild type
MGI:2437126
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Sptbn2tm1Mjac/Sptbn2+ involves: 129P2/OlaHsd MGI:5426692
ht2
Sptbn2Gt(XK442)Byg/Sptbn2+ involves: 129P2/OlaHsd * C57BL/6J MGI:5300033


Genotype
MGI:5426692
ht1
Allelic
Composition
Sptbn2tm1Mjac/Sptbn2+
Genetic
Background
involves: 129P2/OlaHsd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sptbn2tm1Mjac mutation (0 available); any Sptbn2 mutation (98 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
N
• heterozygotes do not show signs of ataxia, with no differences in base width or stride lengths and in motor performance on a stationary rod, elevated beam or a rotating rod task

nervous system
N
• heterozygotes exhibit a normal cerebellum at 2 years of age and do not show signs of cerebellar degeneration or changes in Purkinje cell morphology

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
NOT spinocerebellar ataxia 5 DOID:0050882 OMIM:600224
J:163169




Genotype
MGI:5300033
ht2
Allelic
Composition
Sptbn2Gt(XK442)Byg/Sptbn2+
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sptbn2Gt(XK442)Byg mutation (1 available); any Sptbn2 mutation (98 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• slight motor impairment is observed in the hanging wire test





Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
01/06/2026
MGI 6.24
The Jackson Laboratory