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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Sh2b3em3Cgv
endonuclease-mediated mutation 3, Carola Vinuesa
MGI:7863634
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Sh2b3em3Cgv/Sh2b3em3Cgv C57BL/6NCrl-Sh2b3em3Cgv MGI:8277031
ht2
Sh2b3em3Cgv/Sh2b3+ C57BL/6NCrl-Sh2b3em3Cgv MGI:8277032


Genotype
MGI:8277031
hm1
Allelic
Composition
Sh2b3em3Cgv/Sh2b3em3Cgv
Genetic
Background
C57BL/6NCrl-Sh2b3em3Cgv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sh2b3em3Cgv mutation (0 available); any Sh2b3 mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• mild splenomegaly
• increase in spleen cellularity
• large increase in peripheral blood leukocyte count
• large increase in peripheral blood lymphocyte count
• total number of B cells is increased
• however, frequency of splenic B cells is unchanged
• increase in frequency of splenic transitional B cells, primarily within the transitional 1 (T1) B cell compartment, with a milder increase in transitional 2 (T2) and 3 (T3) B cells
• total number of T cells is increased
• however, frequency of splenic T cells is unchanged
• decrease in marginal zone (MZ) B cells, however, this change is not due to a reduction of MZ B cell numbers but an increase in the other mature B cell subsets in the marginal zone

hematopoietic system
• mild splenomegaly
• increase in spleen cellularity
• large increase in peripheral blood leukocyte count
• large increase in peripheral blood lymphocyte count
• total number of B cells is increased
• however, frequency of splenic B cells is unchanged
• increase in frequency of splenic transitional B cells, primarily within the transitional 1 (T1) B cell compartment, with a milder increase in transitional 2 (T2) and 3 (T3) B cells
• total number of T cells is increased
• however, frequency of splenic T cells is unchanged
• decrease in marginal zone (MZ) B cells, however, this change is not due to a reduction of MZ B cell numbers but an increase in the other mature B cell subsets in the marginal zone

growth/size/body
• mild splenomegaly
• increase in spleen cellularity




Genotype
MGI:8277032
ht2
Allelic
Composition
Sh2b3em3Cgv/Sh2b3+
Genetic
Background
C57BL/6NCrl-Sh2b3em3Cgv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sh2b3em3Cgv mutation (0 available); any Sh2b3 mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• increase in frequency of splenic transitional B cells

immune system
• increase in frequency of splenic transitional B cells





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last database update
01/28/2026
MGI 6.24
The Jackson Laboratory