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. 1997 Oct 6;186(7):977–988. doi: 10.1084/jem.186.7.977

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Model for embryonic traffic of T lineage cells. Colonization of the embryonic thymus occurs in three waves (8). The present study indicates for all three waves the sequential generation of mature γ/δ T cells in ∼9 d, and mature α/β T cells in 12 d. Thymocyte emigration analysis, in agreement with the peaks of emigration period of thymocytes to the spleen and intestine reported previously (11–13), reveals that γ/δ and α/β T cells emigrate from thymus to periphery in alternating waves.