Btnt2

Mus musculus

PHENOTYPE: Mice heterozygous for this phenotypic allele exhibit tan bellies. [provided by MGI curators]

Btnt

Mus musculus

PHENOTYPE: Heterozygotes for this spontaneous mutation exhibit a tan colored coat on the belly. [provided by MGI curators]

t

Drosophila melanogaster

tan (t) encodes a hydrolase involved in both the conversion of N-beta-alanyldopamine to dopamine in the cuticle and central nervous system, and the conversion of beta-alanylhistamine (carcinine) to histamine in the retina. It functions in vision, cuticular melanization, and neurotransmitter recycling.