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. 1996 Dec 1;184(6):2361–2370. doi: 10.1084/jem.184.6.2361

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Fas expression on human adult CNS-derived astrocytes, microglial cells, and known fas-expressing (U251 glioma cells, Jurkat T cells, and U937 myeloid leukemia cells) and fas-negative cells (L929 fibroblast cells). Panels A and B represent adult astrocytes: (A) lack of fas immunoreactivity on astrocytes and (B) GFAP immunoreactivity of the same field as in A to identify astrocytes. Panels C and D represent adult microglial cells. (C) lack of fas immunoreactivity on microglia and (D) Leu M5 immunoreactivity of the same field as in C to identify microglia. The remainder of the panels represent fas immunoreactivity on (E ) U251 glioma cells, (F) Jurkat T cells, (G) U937 myeloid leukemia cells, and (H ) L929 fibroblast cells. Original magnifications: (A, B, E, H) ×400; (C, D, F) ×250.