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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
En2+
wild type
MGI:2158296
Summary 10 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
En2tm1Alj/En2+ either: (involves: 129S2/SvPas * 129/Sv) or (involves: 129S2/SvPas * C57BL/6) or (involves: 129S2/SvPas * CD-1) MGI:2175854
cn2
En1tm1Alj/En1tm8.1Alj
En2tm6Alj/En2+
Gt(ROSA)26Sortm1(cre/ERT2)Alj/Gt(ROSA)26Sor+
involves: 129S1/Sv * 129S6/SvEvTac * 129X1/SvJ * Swiss Webster MGI:4421456
cn3
En1tm8.1Alj/En1+
En2tm6Alj/En2+
Gt(ROSA)26Sortm1(cre/ERT2)Alj/Gt(ROSA)26Sor+
involves: 129S6/SvEvTac * Swiss Webster MGI:4421432
cn4
En1tm2(cre)Wrst/En1tm8.1Alj
En2tm2Alj/En2+
involves: 129/Sv * Black Swiss * C57BL/6 * SJL * Swiss Webster MGI:3789300
cx5
En1tm1Alj/En1tm1Alj
En2tm1Alj/En2+
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ MGI:3718799
cx6
En1tm2Alj/En1+
En2tm2Alj/En2+
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789303
cx7
En1tm5(en)Alj/En1tm5(en)Alj
En2tm2Alj/En2+
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789311
cx8
En1tm3(En2)Alj/En1tm3(En2)Alj
En2tm2Alj/En2+
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789318
cx9
En1tm2Alj/En1tm2Alj
En2tm2Alj/En2+
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789302
cx10
En1tm1Gld/En1tm1Gld
En2tm1Alj/En2+
involves: 129S/SvEv * 129S2/SvPas * C57BL/6 * Swiss Webster MGI:3839948


Genotype
MGI:2175854
ht1
Allelic
Composition
En2tm1Alj/En2+
Genetic
Background
either: (involves: 129S2/SvPas * 129/Sv) or (involves: 129S2/SvPas * C57BL/6) or (involves: 129S2/SvPas * CD-1)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En2tm1Alj mutation (1 available); any En2 mutation (105 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• moderate behavioral impairment




Genotype
MGI:4421456
cn2
Allelic
Composition
En1tm1Alj/En1tm8.1Alj
En2tm6Alj/En2+
Gt(ROSA)26Sortm1(cre/ERT2)Alj/Gt(ROSA)26Sor+
Genetic
Background
involves: 129S1/Sv * 129S6/SvEvTac * 129X1/SvJ * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm1Alj mutation (2 available); any En1 mutation (34 available)
En1tm8.1Alj mutation (1 available); any En1 mutation (34 available)
En2tm6Alj mutation (1 available); any En2 mutation (105 available)
Gt(ROSA)26Sortm1(cre/ERT2)Alj mutation (0 available); any Gt(ROSA)26Sor mutation (1098 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• when given tamoxifen at E10.5, at P21 the anterior region (lobules I-V) is reduced and the central region (lobules VI-VII) is preferentially expanded.
• when tamoxifen is given at E10.5, at P21 lobule VIII extends more laterally than normal, as do lobules I-V but only on one side




Genotype
MGI:4421432
cn3
Allelic
Composition
En1tm8.1Alj/En1+
En2tm6Alj/En2+
Gt(ROSA)26Sortm1(cre/ERT2)Alj/Gt(ROSA)26Sor+
Genetic
Background
involves: 129S6/SvEvTac * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm8.1Alj mutation (1 available); any En1 mutation (34 available)
En2tm6Alj mutation (1 available); any En2 mutation (105 available)
Gt(ROSA)26Sortm1(cre/ERT2)Alj mutation (0 available); any Gt(ROSA)26Sor mutation (1098 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• when tamoxifen is given at E13.5 or E14.5 in adult preculminate (between I-II and III) as lobules I-III are fused
• when tamoxifen is given at E10.5, at P14 lobules VI-VII occupied a greater proportion of the vermis than in wild-type
• when tamoxifen is given at E10.5, at P14 lobules VIII-IX occupied a smaller proportion of the vermis than in wild-type
• when tamoxifen is given at E13.5 or E14.5 in adult the vermis has a foliation pattern that was a milder version than that observed in tamoxifen at 10.5 mutants
• when tamoxifen is given at E13.5 or E14.5 in adult posterior region lobule VIII is shifted posterior and fused with dorsal lobule IX.
• when tamoxifen is given at E13.5 or E14.5 in adult lobules I-V and VIII/IX of the vermis were present more laterally than normal tamoxifen at E13.5 or E14.5 in adult lobules I-III were fused into one lobule




Genotype
MGI:3789300
cn4
Allelic
Composition
En1tm2(cre)Wrst/En1tm8.1Alj
En2tm2Alj/En2+
Genetic
Background
involves: 129/Sv * Black Swiss * C57BL/6 * SJL * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm2(cre)Wrst mutation (1 available); any En1 mutation (34 available)
En1tm8.1Alj mutation (1 available); any En1 mutation (34 available)
En2tm2Alj mutation (0 available); any En2 mutation (105 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• absent at E18.5
• reduced in size at E18.5
• at E18.5, no cerebellum is present




Genotype
MGI:3718799
cx5
Allelic
Composition
En1tm1Alj/En1tm1Alj
En2tm1Alj/En2+
Genetic
Background
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm1Alj mutation (2 available); any En1 mutation (34 available)
En2tm1Alj mutation (1 available); any En2 mutation (105 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system




Genotype
MGI:3789303
cx6
Allelic
Composition
En1tm2Alj/En1+
En2tm2Alj/En2+
Genetic
Background
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm2Alj mutation (1 available); any En1 mutation (34 available)
En2tm2Alj mutation (0 available); any En2 mutation (105 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• delay in cerebellum foliation is observed in adult mice
• in E18.5 mutants, there is a general delay in fissure formation in vermis; less severe than in En2tm2Alj homozygotes
• vermis displays fused folia, and folia I, II, and III are smaller than normal in adults
• folium VIII is positioned between lobule VII and IX; folium VIII position is shifted posteriorly but less than in En2tm2Alj homozygotes
• reduced in size




Genotype
MGI:3789311
cx7
Allelic
Composition
En1tm5(en)Alj/En1tm5(en)Alj
En2tm2Alj/En2+
Genetic
Background
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm5(en)Alj mutation (0 available); any En1 mutation (34 available)
En2tm2Alj mutation (0 available); any En2 mutation (105 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• about half of the expected number of mutants survive to adulthood

nervous system
• reduced in size in surviving adults
• vermis displays fused folia, and folia I, II, and III are smaller than normal in adults
• subregion VIII (posterior vermis) is not present in adults
• in adults, reduced in overall size by one-third relative to controls




Genotype
MGI:3789318
cx8
Allelic
Composition
En1tm3(En2)Alj/En1tm3(En2)Alj
En2tm2Alj/En2+
Genetic
Background
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm3(En2)Alj mutation (0 available); any En1 mutation (34 available)
En2tm2Alj mutation (0 available); any En2 mutation (105 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
N
• cerebellum and colliculi have normal morphology at E18.5




Genotype
MGI:3789302
cx9
Allelic
Composition
En1tm2Alj/En1tm2Alj
En2tm2Alj/En2+
Genetic
Background
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm2Alj mutation (1 available); any En1 mutation (34 available)
En2tm2Alj mutation (0 available); any En2 mutation (105 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• no mutants are detected after birth

nervous system
• absent at E18.5
• absent at E18.5
• at E18.5, no cerebellum is observed




Genotype
MGI:3839948
cx10
Allelic
Composition
En1tm1Gld/En1tm1Gld
En2tm1Alj/En2+
Genetic
Background
involves: 129S/SvEv * 129S2/SvPas * C57BL/6 * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm1Gld mutation (0 available); any En1 mutation (34 available)
En2tm1Alj mutation (1 available); any En2 mutation (105 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

nervous system
• decrease in the number of mesencephalic dopaminergic neurons





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last database update
03/25/2025
MGI 6.24
The Jackson Laboratory