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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Drd3+
wild type
MGI:2435725
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Drd3tm1Dac/Drd3+ involves: 129S4/SvJae * C57BL/6 MGI:3614421
ht2
Drd3tm1Dac/Drd3+ involves: 129S4/SvJae * C57BL/6J MGI:4839943
cx3
Drd2tm1Schm/Drd2tm1Schm
Drd3tm1Schm/Drd3+
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 MGI:3623127


Genotype
MGI:3614421
ht1
Allelic
Composition
Drd3tm1Dac/Drd3+
Genetic
Background
involves: 129S4/SvJae * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Drd3tm1Dac mutation (2 available); any Drd3 mutation (59 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• heterozygotes exhibit increased exploratory behavior in the open field, with a degree of hyperactivity comparable to than of homozygotes during the last 11 min of a 15-min test
• heterozygotes tend to show reduced grooming behavior with a delayed onset; however, these differences are not statistically significant relative to wild-type grooming behavior
• during the first part of the test (increased early and decreased late) unlike wild-type mice
• during the first part of the test (J:96229)
• in the open field test, heterozygotes display hyperactivity, as shown by a 38% increase in locomotor activity (crossings) relative to wild-type mice (J:32128)
• during the first part of the test (J:96229)
• in the open field test, heterozygotes display 77% more rearing episodes than wild-type mice (J:32128)

cardiovascular system
• after anesthesia with pentobarbital
• after anesthesia with pentobarbital

homeostasis/metabolism




Genotype
MGI:4839943
ht2
Allelic
Composition
Drd3tm1Dac/Drd3+
Genetic
Background
involves: 129S4/SvJae * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Drd3tm1Dac mutation (2 available); any Drd3 mutation (59 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• mice exhibit moderately more time in the center of the open field and with the open arms of an elevated plus maze compared with wild-type mice




Genotype
MGI:3623127
cx3
Allelic
Composition
Drd2tm1Schm/Drd2tm1Schm
Drd3tm1Schm/Drd3+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Drd2tm1Schm mutation (0 available); any Drd2 mutation (70 available)
Drd3tm1Schm mutation (0 available); any Drd3 mutation (59 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• male mice 70 days old show decreased locomotor activity and distance traveled compared to wild-type but these parameters are still significantly greater than double homozygotes

homeostasis/metabolism
• although steady state dopamine levels do not differ significantly from wild-type, there is a significant increase in dopamine metabolites (HVA and DOPAC) in male mutants





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