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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Spib+
wild type
MGI:2435802
Summary 1 genotype
Jump to Allelic Composition Genetic Background Genotype ID
cx1
Spi1tm1Sing/Spi1+
Spibtm1Mcs/Spib+
involves: 129S/SvEv * 129X1/SvJ MGI:3609212


Genotype
MGI:3609212
cx1
Allelic
Composition
Spi1tm1Sing/Spi1+
Spibtm1Mcs/Spib+
Genetic
Background
involves: 129S/SvEv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Spi1tm1Sing mutation (0 available); any Spi1 mutation (30 available)
Spibtm1Mcs mutation (0 available); any Spib mutation (23 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• IgM cross-linking or pervanadate/H202 stimulation yields less than normal levels of tyrosine phosphorylation and IgM cross-linking also yields less calcium mobilization than normal
• although the B cell profiles in spleen and lymph node are normal, there are small splenic germinal centers, and inability to maintain germinal centers

immune system
• IgM cross-linking or pervanadate/H202 stimulation yields less than normal levels of tyrosine phosphorylation and IgM cross-linking also yields less calcium mobilization than normal
• although the B cell profiles in spleen and lymph node are normal, there are small splenic germinal centers, and inability to maintain germinal centers

cellular
• IgM cross-linking or pervanadate/H202 stimulation yields less than normal levels of tyrosine phosphorylation and IgM cross-linking also yields less calcium mobilization than normal





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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
12/30/2025
MGI 6.24
The Jackson Laboratory