Term Name: Fraction B precursor B cell
Synonyms: Fr. B, Fraction B
Definition: A precursor B cell that is CD45RA-positive, CD43-positive, CD24-positive and BP-1-negative.
Ontology: Cell Ontology [CL:0002047]

Relationships
develops from: Fraction A pre-pro B cell
develops into: Fraction C precursor B cell
is a type of: Fraction B/C precursor B cell
has_plasma_membrane_part: receptor-type tyrosine-protein phosphatase C isoform CD45R signal transducer CD24
lacks_plasma_membrane_part: glutamyl aminopeptidase