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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Sh2b3em2Cgv
endonuclease-mediated mutation 2, Carola Vinuesa
MGI:7863633
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Sh2b3em2Cgv/Sh2b3em2Cgv C57BL/6NCrl-Sh2b3em2Cgv MGI:8277037
ht2
Sh2b3em2Cgv/Sh2b3+ C57BL/6NCrl-Sh2b3em2Cgv MGI:8277038


Genotype
MGI:8277037
hm1
Allelic
Composition
Sh2b3em2Cgv/Sh2b3em2Cgv
Genetic
Background
C57BL/6NCrl-Sh2b3em2Cgv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sh2b3em2Cgv mutation (0 available); any Sh2b3 mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• mild splenomegaly
• increase in spleen cellularity

hematopoietic system
• mild splenomegaly
• increase in spleen cellularity
• decrease in CD4/CD8 T cell ratios in the spleen but not in peripheral blood
• while the frequency of mature B cells is decreased, total numbers remain elevated as a result of the overall increase in splenic B cells
• increase in peripheral blood leukocyte count
• increase in peripheral blood lymphocyte count
• total number of B cells is increased
• however, frequency of splenic B cells is unchanged
• increase in frequency and total number of splenic transitional B cells; this increase occurs primarily within the transitional 1 (T1) B cell compartment with a milder increase in transitional 2 (T2) and transitional 3 (T3) B cells
• total number of T cells is increased
• however, frequency of splenic T cells is unchanged
• within CD4 T cells, mice show increased percentages and total numbers of regulatory T cells in the spleens
• within CD4 T cells, mice show increased percentages and total numbers of effector memory CD4 T cells in the spleens
• among CD8 T cells, mice show increased percentages of effector memory CD8 T cells in the spleen
• mice show increased activated and/or effector T cells
• decrease in marginal zone (MZ) B cells; this change is not due to a reduction of MZ B cell numbers but an increase in the other mature B cell subsets

immune system
• mild splenomegaly
• increase in spleen cellularity
• decrease in CD4/CD8 T cell ratios in the spleen but not in peripheral blood
• while the frequency of mature B cells is decreased, total numbers remain elevated as a result of the overall increase in splenic B cells
• increase in peripheral blood leukocyte count
• increase in peripheral blood lymphocyte count
• total number of B cells is increased
• however, frequency of splenic B cells is unchanged
• increase in frequency and total number of splenic transitional B cells; this increase occurs primarily within the transitional 1 (T1) B cell compartment with a milder increase in transitional 2 (T2) and transitional 3 (T3) B cells
• total number of T cells is increased
• however, frequency of splenic T cells is unchanged
• within CD4 T cells, mice show increased percentages and total numbers of regulatory T cells in the spleens
• within CD4 T cells, mice show increased percentages and total numbers of effector memory CD4 T cells in the spleens
• among CD8 T cells, mice show increased percentages of effector memory CD8 T cells in the spleen
• mice show increased activated and/or effector T cells
• decrease in marginal zone (MZ) B cells; this change is not due to a reduction of MZ B cell numbers but an increase in the other mature B cell subsets




Genotype
MGI:8277038
ht2
Allelic
Composition
Sh2b3em2Cgv/Sh2b3+
Genetic
Background
C57BL/6NCrl-Sh2b3em2Cgv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sh2b3em2Cgv mutation (0 available); any Sh2b3 mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• intermediate decrease in marginal zone (MZ) B cells; this change is not due to a reduction of MZ B cell numbers but an increase in the other mature B cell subsets

immune system
• intermediate decrease in marginal zone (MZ) B cells; this change is not due to a reduction of MZ B cell numbers but an increase in the other mature B cell subsets





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