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MMP self-activation and activity were prevented by a buffer system consisting of phosphate-buffered saline and 0.05% (vol/vol) Tween 20.
Per reaction, approximately 50 ng of template DNA was used in a buffer system consisting of 10 mM Tris-HCl (pH 9.0), 50 mM KCl, 1.5 mM MgCl2, 0.01% gelatin, 0.1% Triton X-100, 0.2 mM of each of the deoxyribonucleotide triphosphates (Promega Corp ., and 0.2 U Super Taq polymerase (HT Biotechnology Ltd).
For analysis, the hemolymph of Daphnia was considered as a binary buffer system consisting of the carbonate system and a monoprotic non-bicarbonate buffer (HA ↔ H+ + A-).
Briefly, APE1 (50 n) (New England Biolabs) was incubated in a buffer system consisting of 50 m Tris-HCl, pH 8.0, 1 m MgCl2, 50 m NaCl, 2 m DTT at 37°C for 10 min.
Reverse phase chromatography was performed with a binary buffer system consisting of buffer A (0.1% formic acid, 2% acetonitrile in water) and buffer B (0.1% formic acid in acetonitrile).
This column together with a buffer system consisting of water-based mobile buffer A and methanol/acetone-based buffer B, both with a pH between 1 and 2, gave a better peak shape without peak tailing and adequate elution time of 3.7 min (Fig. 1E, ESM Fig. S1A and S1B).
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For HILIC, the buffer system consisted of (A) 25 mM ammonium acetate in water and (B) acetonitrile.
The buffer system consisted of solvent A (20 mM Tris in 6% isopropanol, 4 M urea pH 8.5) and solvent B (20 mM Tris in 6% isopropanol, 4 M urea, 1 M NaCl pH 8.5).
In this case the applied media are buffered by a system consisting of a relatively high amount of NaHCO3 and a 5% CO2 atmosphere to maintain a constant pH between 7.2 and 7.4.
Rotation assays were conducted in buffer C containing an ATP regenerating system consisting of 0.2 mg mL−1 creatine kinase (rabbit muscle, Roche Diagnostics) and 2.5 mM creatine phosphate (Roche Diagnostics).
The fluorescence signal at 370 nm was caused from a blank solution system consisting of methanol:water:phosphate buffer (pH 6.0) (10 10 80, v/v/v).
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