thus , the proliferation of c mu + s mu- bone marrow pre-b cells shows no evidence of feedback control from the mature b lymphocyte pool , as indicated by lack of stimulation of pre-b cell production in anti-igm-treated mice , and is independent of the hemopoietic defects of w/wv or sl/sld mutants .
C1292769
pre-b
C1513019
mature b lymphocyte