Phenotype: thymus rag1 expression absent, 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: thymus
Synonyms:
Definition: Paired organ where maturation of T-lymphocytes occurs. The adult thymus located on the dorsomedial aspect of the branchial cavity above the third pharyngeal cartilage. The thymus undergoes a period of rapid growth beginning at about the third week and continuing for several more weeks. Accompanying this growth is a dramatic change in the shape of the thymus. It is ovoid initially and then starts to grow dorsally along the skull, forming a characteristic protrusion. During this growth period the adult pattern of rag1-positive cortex and rag1-negative medulla becomes established. The protrusions diminish with age and the thymus gradually shrinks; at two years, the thymus is again confined to the pharynx with minimal if any protrusion.
Ontology: Anatomy Ontology [ZFA:0001078]
EXPRESSED GENE:
Symbol: rag1
Name: recombination activating 1
Previous Names: etID309719.25 (1), recombinase

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Location: Chr: 25 Mapping Details/Browsers
EXPRESSION QUALITY:
Name: absent
Synonyms: absence, absent from organism
Definition: A quality denoting the lack of an entity.
Ontology: Phenotypic Quality Ontology [PATO:0000462]