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Fig. 4. Expression of ECM molecules on neurospheres. (A) Laminin
2
chain (red) is highly expressed at the edge of neurospheres. Nuclei are
counterstained with DAPI (green). (B) A model of the neurosphere
three-dimensional structure, summarizing the data presented and showing how
nestin, EGF receptor (EGFR), ß1 integrin (ß) and laminin
2
(L2) are found in the same region. Note that, for clarity, the GFAP
distributed throughout the centre of the sphere is only shown on the left side
of the model, whereas the nestin and BrdU labelling around the perimeter of
the entire sphere is only shown on the right side. (C,D) In the sectioned
neurospheres laminin 1 is found in the center (C), whereas laminin
2
predominates at the edge (A,D). Scale bar: 20 µm.