About   Help   FAQ
Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Usf1+
wild type
MGI:2432588
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
cx1
Clockm1Jt/Clock+
Usf1soc/Usf1+
(BALB/cJ x C57BL/6J)F1 MGI:5515432
cx2
Usf1tm1Msw/Usf1+
Usf2tm1Msw/Usf2tm1Msw
involves: 129S7/SvEvBrd * C57BL/6 MGI:2653879
cx3
Usf1tm1Svl/Usf1+
Usf2tm1Svl/Usf2+
involves: 129S/SvEv * 129S2/SvPas * C57BL/6J MGI:3641446


Genotype
MGI:5515432
cx1
Allelic
Composition
Clockm1Jt/Clock+
Usf1soc/Usf1+
Genetic
Background
(BALB/cJ x C57BL/6J)F1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Clockm1Jt mutation (3 available); any Clock mutation (105 available)
Usf1soc mutation (0 available); any Usf1 mutation (83 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• increased 0.3 hr upon exposure to constant darkness
• Background Sensitivity: mice on a (BALB/cJ x C57BL/6J)F1 background exhibit a shorted extension of activity period upon exposure to constant darkness compared with mice on a C57BL/6J congenic background




Genotype
MGI:2653879
cx2
Allelic
Composition
Usf1tm1Msw/Usf1+
Usf2tm1Msw/Usf2tm1Msw
Genetic
Background
involves: 129S7/SvEvBrd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Usf1tm1Msw mutation (0 available); any Usf1 mutation (83 available)
Usf2tm1Msw mutation (0 available); any Usf2 mutation (13 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• no mice heterozygous for Usf1tm1Msw and homozygous for Usf2tm1Msw are identified among the progeny of double heterozygotes




Genotype
MGI:3641446
cx3
Allelic
Composition
Usf1tm1Svl/Usf1+
Usf2tm1Svl/Usf2+
Genetic
Background
involves: 129S/SvEv * 129S2/SvPas * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Usf1tm1Svl mutation (0 available); any Usf1 mutation (83 available)
Usf2tm1Svl mutation (0 available); any Usf2 mutation (13 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
normal phenotype
• no behavioral defects or anatomical abnormalities in any major organs were seen





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)
Citing These Resources
Funding Information
Warranty Disclaimer, Privacy Notice, Licensing, & Copyright
Send questions and comments to User Support.
last database update
01/28/2026
MGI 6.24
The Jackson Laboratory