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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID 		Spi1tm1.3Nutt
targeted mutation 1.3, Stephen L Nutt
MGI:3578012
Summary 1 genotype
Jump to Allelic Composition Genetic Background Genotype ID
hm1
 		Spi1tm1.3Nutt/Spi1tm1.3Nutt C57BL/6-Sfpi1tm1.3Nutt MGI:3578819


Genotype
MGI:3578819
hm1
Allelic
Composition		 Spi1tm1.3Nutt/Spi1tm1.3Nutt
Genetic
Background		 C57BL/6-Sfpi1tm1.3Nutt
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Spi1tm1.3Nutt mutation (0 available); any Spi1 mutation (29 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
mortality/aging
neonatal lethality, complete penetrance ( J:98188 )
• died shortly after birth

hematopoietic system
absent common myeloid progenitor cells ( J:98188 )
• E18.5 embryos showed an absence of myeloid (Mac-1+Gr-1-) lineage cells




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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Send questions and comments to User Support. 		last database update
09/30/2025
MGI 6.24 		The Jackson Laboratory