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Viral DNA detection of CEV, CyHV-2, and GSIV using Chelex 100 resin and viral DNA extraction kit based on PCR amplification. M: molecular weight marker; lanes 1–5: DNA extracted by Chelex 100 resin (pH 9–10), DNA extracted by Chelex 100 resin (pH 10–11), and DNA extracted by viral extraction kit, positive control, and negative control, respectively.
