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Phenotypes Associated with This Genotype
Genotype
MGI:5581685
Allelic
Composition		 Mafbtm1.2Good/Mafbtm1.2Good
Genetic
Background		 involves: 129S4/SvJae * C57BL/6 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mafbtm1.2Good mutation (0 available); any Mafb mutation (22 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
mortality/aging
neonatal lethality, complete penetrance ( J:207904 )
• mice die within 2 hours of birth

respiratory system
respiratory distress ( J:207904 )
• occasional gasping breaths in neonates

hearing/vestibular/ear

homeostasis/metabolism
cyanosis ( J:207904 )
• at birth

renal/urinary system
abnormal kidney development ( J:207904 )
• renal dysgenesis

growth/size/body
inner ear cyst ( J:207904 )

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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Send questions and comments to User Support. 		last database update
01/06/2026
MGI 6.24 		The Jackson Laboratory