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Phenotypes Associated with This Genotype
Genotype
MGI:5440939
Allelic
Composition		 a/a
Tyrp1b/Tyrp1b
Genetic
Background		 Not Specified
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
a mutation (166 available); any a mutation (468 available)
Tyrp1b mutation (28 available); any Tyrp1 mutation (160 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
integument
abnormal coat/hair pigmentation ( J:12970 )
• eunmelanin is brown rather than black

pigmentation
abnormal coat/hair pigmentation ( J:12970 )
• eunmelanin is brown rather than black
abnormal eye pigmentation ( J:12970 )
• eunmelanin is brown rather than black
abnormal melanocyte morphology ( J:12970 )
• cell shape is spheroid rather than ovoid

vision/eye
abnormal eye pigmentation ( J:12970 )
• eunmelanin is brown rather than black

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
12/30/2025
MGI 6.24 		The Jackson Laboratory