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FISH analysis of placental tissue sections. Probes prepared from BAC clones RP11-294C12 (confirmed target is chromosome X) and RP11-360M1 (supposed to bind to chromosome 4) give compact, easy-to-score hybridization signals on formalin-fixed, paraffin-embedded tissue sections. The red or green signals from the original image together with the DAPI counterstain are overlayed in this gray-scale image. (Bars = 10 mm).
