Stabilization of a G-Quadruplex from Unfolding by Replication Protein A Using Potassium and the Porphyrin TMPyP4

Figure 4

Effect of addition of RPA and RPA-CDE-core on Gq23 in the presence of Na⁺ or K⁺ ions. Addition of increasing molar ratios of RPA to Gq23 at (a) 100 mM NaCl and (b) 100 mM KCl. Addition of increasing molar ratios of RPA-CDE-core to Gq23 at (c) 100 mM NaCl and (d) 100 mM KCl.

(a)

(b)

(c)

(d)