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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Lfngtm1Grid
targeted mutation 1, Tom Gridley
MGI:1933734
Summary 5 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Lfngtm1Grid/Lfngtm1Grid involves: 129S1/Sv MGI:4437858
hm2
Lfngtm1Grid/Lfngtm1Grid involves: 129S1/SvImJ MGI:3039549
cx3
Jag2tm1Grid/Jag2tm1Grid
Lfngtm1Grid/Lfngtm1Grid
involves: 129S1/Sv * C57BL/6J MGI:3696037
cx4
Jag2tm1Grid/Jag2tm1Grid
Lfngtm1Grid/Lfng+
involves: 129S1/Sv * C57BL/6J MGI:3696038
cx5
Lfngtm1Grid/Lfngtm1Grid
Rfngtm1Grid/Rfngtm1Grid
involves: 129S1/SvImJ * C57BL/6J MGI:3039551


Genotype
MGI:4437858
hm1
Allelic
Composition
Lfngtm1Grid/Lfngtm1Grid
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Lfngtm1Grid mutation (1 available); any Lfng mutation (32 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cardiovascular system
• at P4, significantly enhanced sprouting and increased vascular area is observed in the retina

vision/eye
• at P4, significantly enhanced sprouting and increased vascular area is observed in the retina




Genotype
MGI:3039549
hm2
Allelic
Composition
Lfngtm1Grid/Lfngtm1Grid
Genetic
Background
involves: 129S1/SvImJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Lfngtm1Grid mutation (1 available); any Lfng mutation (32 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• some neonatal lethality due to respiratory difficulties related to a malformed rib cage
• less severely affected mice survive

embryo
• defects in somite formation after E8.5
• size and shape are irregular
• metameric pattern is not maintained

skeleton
• number of ribs attached to the sternum is reduced
• some ribs are detached from the vertebral column
• reduced number of ribs
• regular metameric pattern of vertebrae is disrupted
• reduced number of cervical vertebrae

nervous system

reproductive system
• some, but not all, females are infertile (J:48810)
• genetic background may contribute to whether or not mice are fertile (J:105928)

hearing/vestibular/ear
N
• at E18, homozygotes display no alterations in cochlear hair cell number or patterning relative to wild-type or heterozygous mice




Genotype
MGI:3696037
cx3
Allelic
Composition
Jag2tm1Grid/Jag2tm1Grid
Lfngtm1Grid/Lfngtm1Grid
Genetic
Background
involves: 129S1/Sv * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Jag2tm1Grid mutation (1 available); any Jag2 mutation (44 available)
Lfngtm1Grid mutation (1 available); any Lfng mutation (32 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hearing/vestibular/ear
• surprisingly, at E18, double homozygotes display total suppression of the increase in number of hair cells in the IHC row observed in single Jag2tm1Grid homozygotes; this effect is specific for IHCs
• at E18, double homozygotes display disrupted patterning of the OHC rows, similar to single Jag2tm1Grid homozygotes
• at E18, double homozygotes display generation of supernumerary OHCs, similar to single Jag2tm1Grid homozygotes

nervous system
• surprisingly, at E18, double homozygotes display total suppression of the increase in number of hair cells in the IHC row observed in single Jag2tm1Grid homozygotes; this effect is specific for IHCs
• at E18, double homozygotes display disrupted patterning of the OHC rows, similar to single Jag2tm1Grid homozygotes
• at E18, double homozygotes display generation of supernumerary OHCs, similar to single Jag2tm1Grid homozygotes




Genotype
MGI:3696038
cx4
Allelic
Composition
Jag2tm1Grid/Jag2tm1Grid
Lfngtm1Grid/Lfng+
Genetic
Background
involves: 129S1/Sv * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Jag2tm1Grid mutation (1 available); any Jag2 mutation (44 available)
Lfngtm1Grid mutation (1 available); any Lfng mutation (32 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hearing/vestibular/ear
• at E18, these mutants display only partial suppression of the Jag2tm1Grid homozygous mutant phenotype in the IHC row
• in these mice, regions of two rows of IHCs are interspersed with regions of a single row of IHCs

nervous system
• at E18, these mutants display only partial suppression of the Jag2tm1Grid homozygous mutant phenotype in the IHC row
• in these mice, regions of two rows of IHCs are interspersed with regions of a single row of IHCs




Genotype
MGI:3039551
cx5
Allelic
Composition
Lfngtm1Grid/Lfngtm1Grid
Rfngtm1Grid/Rfngtm1Grid
Genetic
Background
involves: 129S1/SvImJ * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Lfngtm1Grid mutation (1 available); any Lfng mutation (32 available)
Rfngtm1Grid mutation (0 available); any Rfng mutation (15 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
skeleton
N
• phenotypes of double homozygotes were identical to those of mice homozygous for Lfngtm1Grid only
• some ribs are detached from the vertebral column
• regular metameric pattern of vertebrae is disrupted





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last database update
05/07/2024
MGI 6.23
The Jackson Laboratory