Genes expected to be absent, or expressed at a notably low level, in these cells, and whose absence supports the assignment of this cell annotation.
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Rationale
The diffuse bipolar 4 (DB4) has two types, DB4a and DB4b. Currently, there exists an Cell Ontology term for DB4, but not for DB4a and DB4b. Two Cell Onotology Terms can be added to the Cell Ontology database. DB4a can be annotated by the marker TTR, and DB4b can be annotated by the marker PRSS12.
