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Phenotypes Associated with This Genotype
Genotype
MGI:3713240
Allelic
Composition
Efnb1tm1Rha/Y
Tg(Pgk1-cre)1Lni/?
Genetic
Background
involves: 129P2/OlaHsd * BALB/c * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Efnb1tm1Rha mutation (4 available); any Efnb1 mutation (15 available)
Tg(Pgk1-cre)1Lni mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• only 15% of expected males reach weaning

reproductive system
N
• the few surviving males are fertile

limbs/digits/tail
• at E12, extra cartilaginous elements are present
• ectopic ossifications form in 4 of 5 adults typically in the posterior limbs and either attached to or in close proximity to triquatral and harnate bone
• distal carpal bones are fused
• almost exclusively of digits I or II and often associated with syndactyly

skeleton
• ectopic ossifications form in 4 of 5 adults typically in the posterior limbs and either attached to or in close proximity to triquatral and harnate bone
• distal carpal bones are fused
• at E15.5, 2 sternal bands are incomplete
• condensing mesenchyme (collagen2a+) in sternal bands is diffuse and poorly delineated
• sternebra are fused in 6 of 11 mice
• ossification centers for sternal segments are expanded and fused regardless of proper rib pairing
• at E18.5, 5 of 11 mice have asymmetric rib pairing
• sternocostal junctions are abnormally positioned and fused in 6 of 11 mice
• cartilages corresponding to the distal carpal bones are delayed or sometimes impaired
• ossification centers in the ribs for sternal segments are expanded and fused in 6 of 11 mice

craniofacial
• at E14.5

homeostasis/metabolism
• in the back region at E14.5

digestive/alimentary system
• at E14.5

growth/size/body
• at E14.5
• at E14.5, the body wall is incompletely closed


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
04/09/2024
MGI 6.23
The Jackson Laboratory