the fmc7 antigen and tracp were not found on early immature pre b-cell proliferations , appeared at early and intermediate b-cell stages , reached their peak of expression in terms of both incidence of positivity and staining intensity at the late b cell stage ( as represented by hairy cell leukemia ) and were lost at the b-cell/plasma cell transition .
C0004561
b cell
C0023443
hairy cell leukemia