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Phenotypes Associated with This Genotype
Genotype
MGI:3040763
Allelic
Composition
Polmtm1Crey/Polmtm1Crey
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Polmtm1Crey mutation (1 available); any Polm mutation (29 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
N
• mice exhibit normal hypermutation patterns
• maturation of B cells from IgM- to IgM+ is slowed down
• light chain rearrangements are impaired
• the separation of T and B cells into separate compartments is absent in Peyer's patches
• underdeveloped B cell compartment in Peyer's patches
• in half of mice (J:75927)
• marked B cell deficiency in the spleen and Peyer's patches in about 50% of homozygotes (J:85190)
• lower cellularity of peripheral lymphoid tissues (spleen and lymph nodes including Peyer's patches)

reproductive system
N
• mice exhibit normal fertility

hematopoietic system
• maturation of B cells from IgM- to IgM+ is slowed down
• light chain rearrangements are impaired
• in half of mice (J:75927)
• marked B cell deficiency in the spleen and Peyer's patches in about 50% of homozygotes (J:85190)

cellular
• maturation of B cells from IgM- to IgM+ is slowed down
• light chain rearrangements are impaired

digestive/alimentary system
• the separation of T and B cells into separate compartments is absent in Peyer's patches
• underdeveloped B cell compartment in Peyer's patches


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
01/20/2026
MGI 6.24
The Jackson Laboratory