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Phenotypes Associated with This Genotype
Genotype
MGI:5515434
Allelic
Composition		 Clockm1Jt/Clock+
Genetic
Background		 B6(C)-Clockm1Jt
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Clockm1Jt mutation (3 available); any Clock mutation (105 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
behavior/neurological
prolonged circadian behavior period ( J:198519 )
• Background Sensitivity: under constant darkness, mice on a C57BL/6 congenic background exhibit prolonged activity periods compared with mice on a congenic BALB/cJ background

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