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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
E2f3tm1Lees
targeted mutation 1, Jacqueline A Lees
MGI:2177435
Summary 6 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
E2f3tm1Lees/E2f3tm1Lees involves: 129S2/SvPas MGI:3840472
hm2
E2f3tm1Lees/E2f3tm1Lees involves: 129S2/SvPas * C57BL/6 MGI:3722935
ht3
E2f3tm1Lees/E2f3+ involves: 129S2/SvPas * C57BL/6 MGI:3722936
cx4
E2f1tm1Njd/E2f1+
E2f3tm1Lees/E2f3tm1Lees
involves: 129S2/SvPas MGI:3840607
cx5
E2f1tm1Njd/E2f1tm1Njd
E2f3tm1Lees/E2f3tm1Lees
involves: 129S2/SvPas MGI:3840609
cx6
E2f1tm1Njd/E2f1tm1Njd
E2f3tm1Lees/E2f3+
involves: 129S2/SvPas MGI:3840610


Genotype
MGI:3840472
hm1
Allelic
Composition
E2f3tm1Lees/E2f3tm1Lees
Genetic
Background
involves: 129S2/SvPas
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
E2f3tm1Lees mutation (1 available); any E2f3 mutation (33 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• increased level of mortality
• only 30% of expected homozygotes present at E18.5
• no viable neonates




Genotype
MGI:3722935
hm2
Allelic
Composition
E2f3tm1Lees/E2f3tm1Lees
Genetic
Background
involves: 129S2/SvPas * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
E2f3tm1Lees mutation (1 available); any E2f3 mutation (33 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• deaths begin at around 7 months
• average life span is 16.6 months
• only one quarter of expected mice are present at weaning (J:65128)
• many mice born alive fail to thrive and die by 48 hours (J:75765)

cellular
• variation in proliferation and growth rates are observed between different mouse embryonic fibroblast preparations due to the genetic background
• using a [3H]thymidine-incorporation assay after exposure to serum following serum starvation, cell cycle progression in mouse embryonic fibroblast cells (MEFs) is slower than in wild-type MEFs
• using a BrdU-incorporation assay, DNA synthesis in mouse embryonic fibroblast cells (MEFs) is slowed and its rate of occurrence is reduced relative to in wild-type MEFs
• although variation in proliferation rates are observed between different mouse embryonic fibroblast (MEF) preparations due to the genetic background, doubling time of MEFs is twice as long as that of MEFs from wild-type embryos

growth/size/body
• surviving mice fail to gain weight at the same rate as littermates
• significantly decreased weight at E18.5

respiratory system
• bilateral pleural effusions
• macrophage in alveolar spaces
• dyspnea in the last few days of life

homeostasis/metabolism
• clot formation specific to the heart
• no pulmonary emboli
• sometimes in the left ventricle
• massive thrombi in the left atria
• bilateral pleural effusions

cardiovascular system
• cause of death in about 85% of mice

immune system
• macrophage in alveolar spaces

integument
• in the last month or two of life




Genotype
MGI:3722936
ht3
Allelic
Composition
E2f3tm1Lees/E2f3+
Genetic
Background
involves: 129S2/SvPas * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
E2f3tm1Lees mutation (1 available); any E2f3 mutation (33 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• some mouse embryonic cells (MEFs) grow as well as wild-type MEFs while others grow at a rate intermediate between wild-type and homozygous nulls




Genotype
MGI:3840607
cx4
Allelic
Composition
E2f1tm1Njd/E2f1+
E2f3tm1Lees/E2f3tm1Lees
Genetic
Background
involves: 129S2/SvPas
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
E2f1tm1Njd mutation (1 available); any E2f1 mutation (28 available)
E2f3tm1Lees mutation (1 available); any E2f3 mutation (33 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice do not survive to E18.5 but are present at E13.5




Genotype
MGI:3840609
cx5
Allelic
Composition
E2f1tm1Njd/E2f1tm1Njd
E2f3tm1Lees/E2f3tm1Lees
Genetic
Background
involves: 129S2/SvPas
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
E2f1tm1Njd mutation (1 available); any E2f1 mutation (28 available)
E2f3tm1Lees mutation (1 available); any E2f3 mutation (33 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• die between E9.5 and E10.5
• embryos normal at E9.5
• much smaller than littermates at E10.5




Genotype
MGI:3840610
cx6
Allelic
Composition
E2f1tm1Njd/E2f1tm1Njd
E2f3tm1Lees/E2f3+
Genetic
Background
involves: 129S2/SvPas
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
E2f1tm1Njd mutation (1 available); any E2f1 mutation (28 available)
E2f3tm1Lees mutation (1 available); any E2f3 mutation (33 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• surviving mice fail to gain weight at the same rate as littermates

reproductive system
• exacerbated
• no loss of leydig cells

endocrine/exocrine glands
• exacerbated
• no loss of leydig cells





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