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. 2015 Jul 14;5:11936. doi: 10.1038/srep11936

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a, Original gastric juice from six individuals (Lanes P1-P6), of pH 1.52, 1.32, 3.57, 1.73, 1.51 and 2.28, respectively. b, Original gastric juices used in a were adjusted to pH 3.8 by the addition of NaH₂PO₄ buffer (pH 8.0). Lane L, DNA ladder; Lane O, original salmon sperm DNA; Lane C, a control of salmon sperm DNA treated by NaH₂PO₄ buffer (pH 3.8). Lanes P1-P6 contain salmon sperm DNA treated with six individuals’ gastric juice after pH adjustment. Digestion was carried out at 37 °C for 3 h and analysed on a 0.8% agarose gel.