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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
En2tm2Alj
targeted mutation 2, Alexandra L Joyner
MGI:1930810
Summary 16 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
En2tm2Alj/En2tm2Alj involves: 129S2/SvPas * C57BL/6 MGI:2175855
hm2
En2tm2Alj/En2tm2Alj involves: 129S2/SvPas * Swiss Webster MGI:3789308
ht3
En2tm2Alj/En2tm3Alj involves: 129S2/SvPas * 129S6/SvEvTac * C57BL/6 MGI:2175857
cn4
En1tm2(cre)Wrst/En1tm8.1Alj
En2tm2Alj/En2+
involves: 129/Sv * Black Swiss * C57BL/6 * SJL * Swiss Webster MGI:3789300
cn5
En1tm2(cre)Wrst/En1tm8.1Alj
En2tm2Alj/En2tm2Alj
involves: 129/Sv * Black Swiss * C57BL/6 * SJL * Swiss Webster MGI:3789301
cn6
En1tm7(cre/ESR1)Alj/En1+
En2tm2Alj/En2tm2Alj
Gt(ROSA)26Sortm1Sor/Gt(ROSA)26Sor+
involves: 129S1/Sv * 129S4/SvJaeSor * 129S6/SvEvTac * 129X1/SvJ * Swiss Webster MGI:3789333
cx7
En1tm2Alj/En1tm2Alj
En2tm2Alj/En2tm2Alj
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:2171403
cx8
En1tm2Alj/En1tm2Alj
En2tm2Alj/En2+
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789302
cx9
En1tm2Alj/En1+
En2tm2Alj/En2+
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789303
cx10
En1tm2Alj/En1+
En2tm2Alj/En2tm2Alj
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789305
cx11
En1tm5(en)Alj/En1tm5(en)Alj
En2tm2Alj/En2tm2Alj
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789310
cx12
En1tm5(en)Alj/En1tm5(en)Alj
En2tm2Alj/En2+
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789311
cx13
En1tm5(en)Alj/En1+
En2tm2Alj/En2tm2Alj
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789315
cx14
En1tm2Alj/En1tm3(En2)Alj
En2tm2Alj/En2tm2Alj
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789316
cx15
En1tm3(En2)Alj/En1tm3(En2)Alj
En2tm2Alj/En2tm2Alj
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789317
cx16
En1tm3(En2)Alj/En1tm3(En2)Alj
En2tm2Alj/En2+
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * Swiss Webster MGI:3789318


Genotype
MGI:2175855
hm1
Allelic
Composition
En2tm2Alj/En2tm2Alj
Genetic
Background
involves: 129S2/SvPas * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En2tm2Alj mutation (0 available); any En2 mutation (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• abnormal folding pattern
• fused folds in the hemispheres results in 3 rather than 4 lobules
• altered pattern
• 3 rather than 4 major folds
• paraflocculus about half normal size
• lobe VIII is associated with lobe IX rather than lobes VI and VII




Genotype
MGI:3789308
hm2
Allelic
Composition
En2tm2Alj/En2tm2Alj
Genetic
Background
involves: 129S2/SvPas * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En2tm2Alj mutation (0 available); any En2 mutation (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• reduced in size at E18.5
• in adults, IC is truncated
• size is slightly reduced at E11.5
• in E18.5 mutants, there is a general delay in fissure formation in vermis
• in adults, vermis is reduced in size
• folium VIII position is shifted posteriorly and is associated with folium IX instead of with VI/VII
• overall size reduced by one-third




Genotype
MGI:2175857
ht3
Allelic
Composition
En2tm2Alj/En2tm3Alj
Genetic
Background
involves: 129S2/SvPas * 129S6/SvEvTac * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En2tm2Alj mutation (0 available); any En2 mutation (104 available)
En2tm3Alj mutation (0 available); any En2 mutation (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
N
• brain morphology is normal




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 (104 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:3789301
cn5
Allelic
Composition
En1tm2(cre)Wrst/En1tm8.1Alj
En2tm2Alj/En2tm2Alj
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 (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• absent at E18.5
• absent at E18.5
• at E18.5, no cerebellum is present




Genotype
MGI:3789333
cn6
Allelic
Composition
En1tm7(cre/ESR1)Alj/En1+
En2tm2Alj/En2tm2Alj
Gt(ROSA)26Sortm1Sor/Gt(ROSA)26Sor+
Genetic
Background
involves: 129S1/Sv * 129S4/SvJaeSor * 129S6/SvEvTac * 129X1/SvJ * Swiss Webster
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
En1tm7(cre/ESR1)Alj mutation (1 available); any En1 mutation (34 available)
En2tm2Alj mutation (0 available); any En2 mutation (104 available)
Gt(ROSA)26Sortm1Sor mutation (7 available); any Gt(ROSA)26Sor mutation (993 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• when tamoxifen is administered at E10.5, rhombomere 1 (r1) is reduced in size in mutants at E12.5
• anterior r1 cells contribute to more lateral regions of vermis than normal
• when tamoxifen is administered at E10.5, mesencephalon is reduced in size at E12.5 relative to normal
• marked cells in posterior mesencephalon do not expand normally
• when tamoxifen is administered at E10.5, size of marked domain is smaller than wild-type at E16.5
• in adults, marked domain in tectum is greatly reduced compared to wild-type; marked domain is restricted to remaining region of inferior colliculus
• when tamoxifen is administered at E10.5, size of marked cell population is wider in mutants than in controls at E16.5
• in adults, marked domain is broader than normal
• in adults, vermis is reduced in size

embryo
• when tamoxifen is administered at E10.5, rhombomere 1 (r1) is reduced in size in mutants at E12.5
• anterior r1 cells contribute to more lateral regions of vermis than normal




Genotype
MGI:2171403
cx7
Allelic
Composition
En1tm2Alj/En1tm2Alj
En2tm2Alj/En2tm2Alj
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 (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• most or all of r1 deleted by E9.5
• most or all of r1 deleted by E9.5
• development normal through early somite stage but abnormal by 10-12 somite stage
• general deletion of the mesencephalon/anterior metencephalon region at E9.5
• absent at E18.5
• absent at E18.5
• mostly, if not entirely, deleted at E9.5
• reduced in overall size by one-third at E18.5

embryo
• most or all of r1 deleted by E9.5
• most or all of r1 deleted by E9.5




Genotype
MGI:3789302
cx8
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 (104 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:3789303
cx9
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 (104 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:3789305
cx10
Allelic
Composition
En1tm2Alj/En1+
En2tm2Alj/En2tm2Alj
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 (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
N
• mutants survive to adulthood

nervous system
• severely truncated in one mutant and fused with folia I-V remnants
• at E18.5, absent in 1 mutant
• at E18.5, structure is absent (1 mutant) or only small amount of tissue is present
• partially truncated in adults
• at E11.5, truncation of tectum is greater than in En2tm2Alj homozygotes
• in posterior hemisphere crusil and paramedian folia are fused; in one embryo, a partial fissure separating crusil and paramedian folia is observed at E18.5
• hemispheres are reduced in size compared to En2tm2Alj adult homozygotes
• delay in cerebellum foliation is more severe than in En2tm2Alj homozygotes
• there are more foliation defects adults than in En2tm2Alj adult homozygotes or or En1tm2Alj / En2tm2Alj adult double heterozygotes
• in most mutants, the five anterior-most folia (I-V) are replaced by a single fold
• only 1 distinct folium is present in anterior vermis
• substantial deletion of folium VIII is detected in adults
• in some mutants, folium VIII is absent or reduced in size and misaligned with folium IX; in one mutant folia I-V are almost completely absent and fused to profoundly truncated tectum
• in one mutant at E18.5
• at E18.5, no cerebellum is observed in some mutants
• reduced in overall size by half at E18.5 in some mutants
• size reduction in adults is greater than in En2tm2Alj or En1tm2Alj / En2tm2Alj adult heterozygotes
• size reduction at E11.5 is greater than in En2tm2Alj homozygotes




Genotype
MGI:3789310
cx11
Allelic
Composition
En1tm5(en)Alj/En1tm5(en)Alj
En2tm2Alj/En2tm2Alj
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 (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• no mutants are detected after birth

nervous system
• structure does not form
• in some mutants, structure does not form
• in some mutants structure is half normal size
• at E18.5, no cerebellum is observed




Genotype
MGI:3789311
cx12
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 (104 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:3789315
cx13
Allelic
Composition
En1tm5(en)Alj/En1+
En2tm2Alj/En2tm2Alj
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 (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• reduced in size at E18.5
• in posterior hemisphere crusil and paramedian folia are fused; in one embryo, a partial fissure separating crusil and paramedian folia is observed
• foliation defects are milder than in En1tm2Alj /+, En2tm2Alj homozygotes; most mutants have foliation pattern similar to hemispheres of En2tm2Alj homozygotes
• subregion VIII (posterior vermis) is not present at E18.5
• at E18.5, reduced in overall size by one-third relative to controls




Genotype
MGI:3789316
cx14
Allelic
Composition
En1tm2Alj/En1tm3(En2)Alj
En2tm2Alj/En2tm2Alj
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)
En1tm3(En2)Alj mutation (0 available); any En1 mutation (34 available)
En2tm2Alj mutation (0 available); any En2 mutation (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• reduced in size at E18.5
• in posterior hemisphere crusil and paramedian folia are fused; in one embryo, a partial fissure separating crusil and paramedian folia is observed
• foliation defects are milder than in En1tm2Alj /+, En2tm2Alj homozygotes; most mutants have foliation pattern similar to hemispheres of En2tm2Alj homozygotes
• subregion VIII (posterior vermis) is not present at E18.5
• at E18.5, reduced in overall size by one-third relative to controls




Genotype
MGI:3789317
cx15
Allelic
Composition
En1tm3(En2)Alj/En1tm3(En2)Alj
En2tm2Alj/En2tm2Alj
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 (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
N
• mice are viable into adulthood

nervous system
• in posterior hemisphere crusil and paramedian folia are fused
• in a small number of mutants, folium VIII is abnormal, being associated with folium IX
• at E18.5, reduced in overall size by one-third relative to controls




Genotype
MGI:3789318
cx16
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 (104 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
N
• cerebellum and colliculi have normal morphology at E18.5





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last database update
11/12/2024
MGI 6.24
The Jackson Laboratory