Phenotype: swim bladder nkx2.4b expression decreased amount, abnormal
Note: This phenotype statement describes a gene expression or antibody labeling pattern. Anatomy terms are combined with a gene or antibody and phenotype quality.
EXPRESSION ANATOMY:
Name: swim bladder
Synonyms: gas bladder
Definition: The swim bladder is a double-chambered organ located in the coelom and used to maintain buoyancy and may function as an acoustic resonator. The zebrafish does not appear to have a gas gland, but it is not yet clear if there are gas producing cells distributed more widely.
Ontology: Anatomy Ontology [ZFA:0000076]
EXPRESSED GENE:
Symbol: nkx2.4b
Name: NK2 homeobox 4b
Previous Names: nk2.1a (1), nkx2.1 (1), nkx2.1a, nkx2.4a (1), titf1, titf1a (1)

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Location: Chr: 20 Mapping Details/Browsers
EXPRESSION QUALITY:
Name: decreased amount
Synonyms: decreased, decreased number, present in fewer numbers in organism, reduced, subnumerary
Definition: An amount which is relatively low.
Ontology: Phenotypic Quality Ontology [PATO:0001997]