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Phenotypes Associated with This Genotype
Genotype
MGI:5508237
Allelic
Composition		 Krastm1Bbd/Kras+
Mapk3tm1Gpg/Mapk3tm1Gpg
Genetic
Background		 involves: 129/Sv * 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Bbd mutation (2 available); any Kras mutation (69 available)
Mapk3tm1Gpg mutation (1 available); any Mapk3 mutation (27 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
mortality/aging
premature death ( J:172200 )
• 50% survival at 46.3 weeks of age is seen following intratracheal instillation of Ad-Cre, a 20% increase in survival compared to single Kras mutants

neoplasm
increased lung non-small cell carcinoma incidence ( J:172200 )
• mice develop non-small cell lung carcinoma following intratracheal instillation of adenovirus expressing Cre-recombinase (Ad-Cre); tumor burden in similar to that seen in single Kras heterozygotes

respiratory system
increased lung non-small cell carcinoma incidence ( J:172200 )
• mice develop non-small cell lung carcinoma following intratracheal instillation of adenovirus expressing Cre-recombinase (Ad-Cre); tumor burden in similar to that seen in single Kras heterozygotes

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
01/13/2026
MGI 6.24 		The Jackson Laboratory