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Fig. 4. Characterization of the first wave of T lymphopoiesis in the developing
thymus. (A) Thymus rudiment sections from E11.25, E12.5 or E14.5
embryos were stained with an anti-GFP antibody. (B) Flow cytometry
analysis showed that 82.3% of total CD45+ mononuclear cells in the
E12.5 thymus expressed RAG1/GFP. The data is representative of three
independent analyses. (C) GFP+ cells were sorted from the
E12.5 thymus, and then stained with anti-PECAM-1/CD31 followed by
APC-anti-Kit, biotinylated anti-CD34 and streptavidin-PE-TR. (D)
GFP+ cells from E12.5 or E13.5 thymus were stained with
PE-anti-CD25 and APC-anti CD44.