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Phenotypes Associated with This Genotype
Genotype
MGI:2683606
Allelic
Composition
Icosltm1Cdon/Icosltm1Cdon
Genetic
Background
involves: 129S6/SvEvTac
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Icosltm1Cdon mutation (0 available); any Icosl mutation (25 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• much smaller spleens
• about 1/3 as many cells as in wild-type mice
• production of IgE essentially absent
• moderate reductions of IgG1 and IgG2a levels
• significantly reduced levels
• defect indicated by low Il-4 levels and low IgF1 and IgE levels

immune system
• much smaller spleens
• about 1/3 as many cells as in wild-type mice
• production of IgE essentially absent
• moderate reductions of IgG1 and IgG2a levels
• significantly reduced levels
• defect indicated by low Il-4 levels and low IgF1 and IgE levels
• Ifn-gamma levels slightly increased
• Il-2 production reduced
• Il-4 production greatly impaired

homeostasis/metabolism
• Ifn-gamma levels slightly increased


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