Fig. 4. Presence of EGFP+ cells in the thyroid of EGFP+
EGFP bone marrow radiation chimeras. Unstained
thyroid tissue sections from EGFP+
EGFP
bone marrow radiation chimeras have intrathyroidal cells with endogenous green
fluorescence. Note the presence of EGFP+ cells surrounding thyroid
follicles from 120 weeks post-bone marrow transfer. Magnification
400x.