lacks_part lacks_plasma_membrane_part output of precursor B cell pre-B-II cell A pre-B-II cell is a precursor B cell that expresses immunoglobulin mu heavy chain (IgHmu+), and lack expression of CD34, TdT, immunoglobulin kappa light chain and immunoglobulin lambda light chain. CALOHA:TS-0819 pre-B-II cell are also reportedly CD19-positive, CD22-positive, CD38-positive, CD45-positive, and CD48-positive. BTO:0001133 pre-B-lymphocyte pre-BII cell immunoglobulin heavy chain V-D-J recombination CD34 molecule DNA nucleotidylexotransferase