Skip to main content
. 2015 Jul 14;5:11936. doi: 10.1038/srep11936

Figure 2. Validation of nucleic acid digestion by pepsin.

Figure 2

a, Digestion of various DNA and RNA by commercial porcine pepsin. Lane 1, 2: salmon sperm DNA; Lane 3, 4: λ DNA; Lane 5, 6: pET-28a; Lane 7, 8: M13mp18; Lane 9, 10: RNA ladder. Other conditions: 4.0 mg ml−1 of pepsin, NaH2PO4 buffer (25 mM, pH 3.8, including 200 mM NaCl), 37 °C, 5 h. For RNA, the digestion time was 1 h. b, Effect of alkaline conditions on pepsin NA digestion. Lane 1, original λ DNA; Lane 2, digested by active pepsin; Lane 3, digested by NaOH-pretreated pepsin. c, Digestion of λ DNA by commercial porcine pepsin (Lane P), recombinant pepsin (Lane rP) and mutant pepsin (Lane mP). Conditions: 0.15 mg ml−1 enzymes, pH 3.8, 37 °C, 12 h. A 0.8% agarose gel was used for electrophoresis.