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Phenotypes Associated with This Genotype
Genotype
MGI:3618278
Allelic
Composition
Lfngtm1Rjo/Lfngtm1Rjo
Genetic
Background
involves: 129S7/SvEvBrd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Lfngtm1Rjo mutation (0 available); any Lfng mutation (34 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• homozygotes die late in embryonic lethality

skeleton
• incompletely formed vertebrae

embryo
• failure of caudal and rostral spatial definition of half-somites
• when mutant fetal liver cells is mixed 1:1 with wild-type bone marrow and transferred into lethally irradiated hosts, there is a slight reduction in the number of marginal zone B cells generated compared to controls

reproductive system
• reproductive tracts of 4 and 7 week old null mice are smaller than heterozygous littermates
• sexually mature mice had normal follicles of all sizes and abnormal follicles
• ovaries of 4 and 7 week old null mice are smaller than heterozugous littermates
• after induced ovulation and fertilization, only 9.7% of eggs became 2-cell embryos compared to 48.8% of controls
• only 2% of embryos became 4 to 8 cell embryos and none reached the blastocyst stage compared to 31.4% of controls that reached blastocysts stage
• oocytes do not complete meiotic maturation
• all females found infertile due to defects in meiotic maturation

endocrine/exocrine glands
• sexually mature mice had normal follicles of all sizes and abnormal follicles
• ovaries of 4 and 7 week old null mice are smaller than heterozugous littermates

hematopoietic system
• when mutant fetal liver cells is mixed 1:1 with wild-type bone marrow and transferred into lethally irradiated hosts, there is a slight reduction in the number of marginal zone B cells generated compared to controls

cellular
• after induced ovulation and fertilization, only 9.7% of eggs became 2-cell embryos compared to 48.8% of controls
• only 2% of embryos became 4 to 8 cell embryos and none reached the blastocyst stage compared to 31.4% of controls that reached blastocysts stage
• oocytes do not complete meiotic maturation


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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last database update
01/06/2026
MGI 6.24
The Jackson Laboratory