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. 2017 Aug 3;12(8):e0181949. doi: 10.1371/journal.pone.0181949

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© 2017 Cai et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 3 — Beef and pork DNA samples of known concentrations were prepared and analyzed by ddPCR. Each detection point data is the average of triplicate samples from three independent experiments. Sample nucleic acid (ng) content and DNA copy number have a linear relationship: R² = 0.9939 for beef (A) and R² = 0.9978 for pork (B).