title: The prothymocyte revisited.
mesh_terms: D001402:B-Lymphocytes / Q000166:cytology; D002454:Cell Differentiation; D004253:DNA Nucleotidylexotransferase / Q000032:analysis; D006412:Hematopoietic Stem Cells / Q000166:cytology; D006801:Humans; D007136:Immunoglobulins / Q000235:genetics; D007938:Leukemia / Q000473:pathology; D013601:T-Lymphocytes / Q000166:cytology*
chemical_list: D007136:Immunoglobulins; D004253:DNA Nucleotidylexotransferase