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Phenotypes Associated with This Genotype
Genotype
MGI:3845775
Allelic
Composition		 Per1tm1Saco/Per1tm1Saco
Genetic
Background		 involves: 129S2/SvPas * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Per1tm1Saco mutation (0 available); any Per1 mutation (65 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
behavior/neurological
shortened circadian behavior period ( J:70850 )
• under constant dark conditions

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
03/24/2026
MGI 6.24 		The Jackson Laboratory