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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID 		Xbp1tm1Tiw
targeted mutation 1, Takao Iwawaki
MGI:4365400
Summary 1 genotype
Jump to Allelic Composition Genetic Background Genotype ID
hm1
 		Xbp1tm1Tiw/Xbp1tm1Tiw involves: 129S4/SvJae * C57BL/6 MGI:4365403


Genotype
MGI:4365403
hm1
Allelic
Composition		 Xbp1tm1Tiw/Xbp1tm1Tiw
Genetic
Background		 involves: 129S4/SvJae * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Xbp1tm1Tiw mutation (1 available); any Xbp1 mutation (31 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
embryo
abnormal extraembryonic tissue physiology ( J:153222 )
• expression analysis suggests that ER stress may be increased in the placenta

growth/size/body
decreased embryo size ( J:153222 )
• at E13.5




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
10/07/2025
MGI 6.24 		The Jackson Laboratory