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FISH for Her-2 gene amplification. Figure 2 (A) Negative amplification of human epidermal growth factor receptor-2/neu (Her-2) gene case with the ratio of Her-2 (red signals) to CEP 17 (green signals) is obviously smaller than 1.8; (B) Positive amplification of human epidermal growth factor receptor-2/neu (Her-2) gene case with the ratio of Her-2 (red signals) to CEP 17 (green signals) is obviously larger than 2.2.
