has_not_completed lacks_plasma_membrane_part has plasma membrane part in taxon develops from develops from has low plasma membrane amount precursor B cell fraction C' precursor B cell fraction D precursor B cell 2010-04-28T02:55:16Z 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. Fr. D fraction D pre-B cell Fraction D precursor B cells are also reportedly CD24-positive and sIgD-negative. fraction B/C precursor B cell pre-B cell receptor complex immunoglobulin light chain V-J recombination Mus musculus CD19 molecule receptor-type tyrosine-protein phosphatase C isoform CD45RABC interleukin-2 receptor subunit alpha leukosialin signal transducer CD24 complement component C1q receptor glutamyl aminopeptidase