The newspaper said it paid about $500 for the lab, which specializes in fish testing, to conduct a polymerase chain reaction, or PCR, test to see if the substance had any of five different tuna species. PCR tests rapidly replicate huge amounts of a specific DNA sample.
>The newspaper said it paid about $500 for the lab, which specializes in fish testing, **to conduct a polymerase chain reaction, or PCR, test** to see if the substance had any of five different tuna species. PCR tests rapidly replicate huge amounts of a specific DNA sample.
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