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Phenotypes Associated with This Genotype
Genotype
MGI:5438572
Allelic
Composition
Nrarptm1Grid/Nrarptm1Grid
Genetic
Background
involves: 129S1/Sv * 129S1/SvImJ * 129X1/SvJ * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrarptm1Grid mutation (1 available); any Nrarp mutation (7 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
skeleton
• at low penetrance
• Background Sensitivity: less severe than on a pure 129 background
• in the thoracic, lumbar, sacral and caudal regions but not cervical
• fusion of adjacent vertebral bodies and pedicles
• Background Sensitivity: mice on a mixed 129 and C57BL/6J background exhibit less penetrance and expressivity of vertebral abnormalities compared to on a pure 129 background
• Background Sensitivity: additional backcrossing to C67BL/6J rescues all but the defects in the ninth and tenth thoracic vertebra

limbs/digits/tail


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
05/19/2026
MGI 6.24
The Jackson Laboratory