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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID 		Etn2tm2.1Kymm
targeted mutation 2.1, Ken-ichi Yamamura
MGI:5502903
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
 		Etn2tm2.1Kymm/Etn2tm2.1Kymm B6.Cg-Etn2tm2.1Kymm MGI:5508199
ht2
 		Etn2tm2.1Kymm/Etn2+ B6.Cg-Etn2tm2.1Kymm MGI:5508198


Genotype
MGI:5508199
hm1
Allelic
Composition		 Etn2tm2.1Kymm/Etn2tm2.1Kymm
Genetic
Background		 B6.Cg-Etn2tm2.1Kymm
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Etn2tm2.1Kymm mutation (0 available); any Etn2 mutation (3 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
mortality/aging

skeleton
abnormal nucleus pulposus morphology ( J:195133 )
• less severe than in Etn2Sd homozygotes

limbs/digits/tail
short tail ( J:195133 )
• less severe than in Etn2Sd homozygotes

digestive/alimentary system
anal atresia ( J:195133 )
• less severe than in Etn2Sd homozygotes

renal/urinary system
renal hypoplasia ( J:195133 )
• less severe than in Etn2Sd homozygotes




Genotype
MGI:5508198
ht2
Allelic
Composition		 Etn2tm2.1Kymm/Etn2+
Genetic
Background		 B6.Cg-Etn2tm2.1Kymm
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Etn2tm2.1Kymm mutation (0 available); any Etn2 mutation (3 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
limbs/digits/tail
kinked tail ( J:195133 )
• in 6 of 22 mice




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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
09/30/2025
MGI 6.24 		The Jackson Laboratory