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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Per2+
wild type
MGI:2435032
Summary 9 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Per2M1Btlr/Per2+ C57BL/6J-Per2M1Btlr MGI:5906453
cn2
Albtm1(cre/ERT2)Mtz/Alb+
Per2tm1Jt/Per2+
Smg6tm1.1Tac/Smg6tm1.1Tac
involves: 129S2/SvPas * 129S6/SvEvTac * C57BL/6J MGI:7571625
cx3
Opn5tm1.1Lan/Opn5tm1.1Yau
Per2tm1Jt/Per2+
involves: 129S4/SvJaeSor * 129S6/SvEvTac * C57BL/6N * FVB/N MGI:5897197
cx4
Opn5tm1.1Lan/Opn5tm1.1Lan
Per2tm1Jt/Per2+
involves: 129S4/SvJaeSor * 129S6/SvEvTac * C57BL/6N * FVB/N MGI:5897196
cx5
Opn1swtm1.2Mnei/Opn1swtm1.2Mnei
Per2tm1Jt/Per2+
involves: 129S6/SvEvTac MGI:5897206
cx6
Opn5tm1.1Yau/Opn5tm1.1Yau
Per2tm1Jt/Per2+
involves: 129S6/SvEvTac MGI:5897200
cx7
Clockm1Jt/Clock+
Per2tm1Jt/Per2+
Usf1soc/?
involves: 129S6/SvEvTac * BALB/cJ * C57BL/6J MGI:5515433
cx8
Per2tm1Jt/Per2+
Zfhx3Sci/Zfhx3+
involves: 129S6/SvEvTac * BALB/cOlaHsd * C3H/HeH * C57BL/6J MGI:5661032
cx9
Opn3tm2b(EUCOMM)Wtsi/Opn3tm2b(EUCOMM)Wtsi
Per2tm1Jt/Per2+
involves: 129S6/SvEvTac * C57BL/6J * C57BL/6N * CBA MGI:5897203


Genotype
MGI:5906453
ht1
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
• mice exhibit a short circadian period in constant darkness




Genotype
MGI:7571625
cn2
Allelic
Composition
Albtm1(cre/ERT2)Mtz/Alb+
Per2tm1Jt/Per2+
Smg6tm1.1Tac/Smg6tm1.1Tac
Genetic
Background
involves: 129S2/SvPas * 129S6/SvEvTac * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Albtm1(cre/ERT2)Mtz mutation (1 available); any Alb mutation (91 available)
Per2tm1Jt mutation (4 available); any Per2 mutation (73 available)
Smg6tm1.1Tac mutation (0 available); any Smg6 mutation (97 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• when entrained on a light phase feeding regimen
• 3-hours longer period in liver explants
• phase differences at the pre-mRNA level for many core clock genes in liver
• when entrained on a light phase feeding regimen




Genotype
MGI:5897197
cx3
Allelic
Composition
Opn5tm1.1Lan/Opn5tm1.1Yau
Per2tm1Jt/Per2+
Genetic
Background
involves: 129S4/SvJaeSor * 129S6/SvEvTac * C57BL/6N * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Opn5tm1.1Lan mutation (0 available); any Opn5 mutation (22 available)
Opn5tm1.1Yau mutation (0 available); any Opn5 mutation (22 available)
Per2tm1Jt mutation (4 available); any Per2 mutation (73 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
• ex vivo corneal photoentrainment is abolished




Genotype
MGI:5897196
cx4
Allelic
Composition
Opn5tm1.1Lan/Opn5tm1.1Lan
Per2tm1Jt/Per2+
Genetic
Background
involves: 129S4/SvJaeSor * 129S6/SvEvTac * C57BL/6N * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Opn5tm1.1Lan mutation (0 available); any Opn5 mutation (22 available)
Per2tm1Jt mutation (4 available); any Per2 mutation (73 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
• ex vivo corneal photoentrainment is abolished




Genotype
MGI:5897206
cx5
Allelic
Composition
Opn1swtm1.2Mnei/Opn1swtm1.2Mnei
Per2tm1Jt/Per2+
Genetic
Background
involves: 129S6/SvEvTac
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Opn1swtm1.2Mnei mutation (0 available); any Opn1sw mutation (23 available)
Per2tm1Jt mutation (4 available); any Per2 mutation (73 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
N
• retinas exhibit normal photoentrainment to white light, photosensitivity to violet light and corneal photoentrainment




Genotype
MGI:5897200
cx6
Allelic
Composition
Opn5tm1.1Yau/Opn5tm1.1Yau
Per2tm1Jt/Per2+
Genetic
Background
involves: 129S6/SvEvTac
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Opn5tm1.1Yau mutation (0 available); any Opn5 mutation (22 available)
Per2tm1Jt mutation (4 available); any Per2 mutation (73 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
N
• mice exhibit normal retinal histology and normal optokinetic tracking reflex
• retinas fail to exhibit light/dark entrainment




Genotype
MGI:5515433
cx7
Allelic
Composition
Clockm1Jt/Clock+
Per2tm1Jt/Per2+
Usf1soc/?
Genetic
Background
involves: 129S6/SvEvTac * BALB/cJ * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Clockm1Jt mutation (3 available); any Clock mutation (105 available)
Per2tm1Jt mutation (4 available); any Per2 mutation (73 available)
Usf1soc mutation (0 available); any Usf1 mutation (83 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• Background Sensitivity: shorter period compared to in mice on a background with more C57BL/6 contribution




Genotype
MGI:5661032
cx8
Allelic
Composition
Per2tm1Jt/Per2+
Zfhx3Sci/Zfhx3+
Genetic
Background
involves: 129S6/SvEvTac * BALB/cOlaHsd * C3H/HeH * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Per2tm1Jt mutation (4 available); any Per2 mutation (73 available)
Zfhx3Sci mutation (2 available); any Zfhx3 mutation (131 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• the suprachiasmatic nucleus has a shorter circadian period, the period distribution is broader, and relative amplitude error (RAE) is increased in individual neurons imaged across the suprachiasmatic nucleus circuit




Genotype
MGI:5897203
cx9
Allelic
Composition
Opn3tm2b(EUCOMM)Wtsi/Opn3tm2b(EUCOMM)Wtsi
Per2tm1Jt/Per2+
Genetic
Background
involves: 129S6/SvEvTac * C57BL/6J * C57BL/6N * CBA
Cell Lines EPD0197_3_E01
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Opn3tm2b(EUCOMM)Wtsi mutation (0 available); any Opn3 mutation (25 available)
Per2tm1Jt mutation (4 available); any Per2 mutation (73 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
N
• retinas exhibit normal circadian photoentrainment and corneal photoentrainment





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last database update
01/13/2026
MGI 6.24
The Jackson Laboratory