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Figure 1: Fluorescence in-situ hybridization for chromosome 6: bottom arrow, four signals of an interphase nucleus (normal): two green signals (internal control) represent the centromere of chromosome 6 and two red signals represent the 6q21region; top arrows, two interphase cells with three signals: two green (internal control) and one red signal, representing the deletion of 6q21 (bottom arrow). |
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