Term Name:	Fraction E immature B cell
Synonyms:
Definition:	An immature B cell that is IgM-positive, CD45R-positive, CD43-low, CD25-negative, and CD127-negative. This cell type has also been described as being AA4-positive, IgM-positive, CD19-positive, CD43-low/negative, and HSA-positive.
Ontology:	Cell Ontology [CL:0002054]