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Fig. 4

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ZDB-IMAGE-101122-31
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Figures for Soza-Ried et al., 2010
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Fig. 4

Failure of thymopoiesis in c-myb mutants. (A) Lack of thymus colonization in c-myb mutants transgenic for ikaros:eGFP. Still photographs were taken from Movies S9 and S10 at the indicated time points of the observation period (t0 = 55 hpf), equivalent to <68 hpf. Note the cluster of green cells in the thymus (encircled), whereas the thymus of mutants lacks such cells. A progenitor cell approaching the thymus is seen at the bottom right corner of the image of wild-type fish. (B) No evidence for thymopoiesis in early larvae. WISH was done with probes indicated at 5 dpf; the thymic area (encircled) is shown. Note the presence of small numbers of cells expressing l-plastin in the c-myb mutants, a marker associated with the myelo-monocytic lineage. This most likely represents embryonic macrophages situated in the thymus (Movies S9 and S10).

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