title: Redefinition of lymphoid progenitors.
abstract: Similarities between T and B lymphocytes might have led to the idea that these functionally distinct cells develop from a common lymphoid progenitor. However, investigations with a new clonal assay which allows for T-, B- and myeloid-lineage development indicate that commitment to T-cell and B-cell lineages occurs instead through myeloid/T and myeloid/B bipotential stages, respectively. These findings provide an opportunity to reconsider the ontogeny and phylogeny of T- and B-cell development.
authors.affiliation: Department of Immunology, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan. katsura@frontier.kyoto-u.ac.jp
authors.forename: Yoshimoto
authors.initials: Y
authors.lastname: Katsura
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000502:physiology*; D006410:Hematopoiesis; D006412:Hematopoietic Stem Cells / Q000502:physiology*; D006801:Humans; D008954:Models, Biological; D013601:T-Lymphocytes / Q000502:physiology*