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DNA adsorbed to (A) MagPrep silica beads and (B) Sigma-Aldrich silica particles as function of KCl concentration at pH 5 in glycine buffer. Increasing the concentration of KCl increased the amount of DNA adsorbed. DNA adsorbed to (C) MagPrep silica beads and (D) Sigma-Aldrich silica particles as function of pH in glycine buffer with 400 mM KCl. The amount of DNA adsorbed decreases sharply between pH 6 and 8.
