Term Name:	Fraction D precursor B cell
Synonyms:	Fr. D, Fraction D pre-B cell
Definition:	A pre-B cell that is pre-BCR-negative, and the kappa- and lambda- light immunoglobulin light chain-negative, CD43-low, and is BP-1-positive, CD45R-positive and CD25-positive. This cell type is also described as being AA4-positive, IgM-negative, CD19-positive, CD43-low/negative, and HSA-positive.
Ontology:	Cell Ontology [CL:0002052]