Fig. 6. Presence of EGFP⁺ cells, CD11b⁺ cells and LCA⁺ cells in the thyroid of EGFP⁺ EGFP^– bone marrow radiation chimeras (week 3). Thyroid tissue sections from EGFP⁺ EGFP^– bone marrow radiation chimeras have EGFP⁺ cells (unstained section), and cells reactive with anti-CD11b and anti-CD45 LCA, suggesting that EGFP⁺ cells originate from bone marrow hematopoietic cells and not from bone marrow stromal cells. Magnification 400x.