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Phenotypes Associated with This Genotype
Genotype
MGI:5906453
Allelic
Composition		 Per2M1Btlr/Per2+
Genetic
Background		 C57BL/6J-Per2M1Btlr
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Per2M1Btlr mutation (1 available); any Per2 mutation (73 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
behavior/neurological
shortened circadian behavior period ( J:101977 )
• mice exhibit a short circadian period in constant darkness

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
03/31/2026
MGI 6.24 		The Jackson Laboratory