Figure 9
Ion binding to a P4P6 mutant that does not exhibit specific Mg2+ binding in the `ion core'. The number of excess Mg2+ ions was measured using a fluorescence indicator (circles) and AES (squares) by Das et al. (2005) in 2 M NaCl background. Theoretical predictions were obtained from PB calculations using the PDB coordinates (thin, solid lines) or the reconstructed bead model with uniformly assigned charges (thick, dashed lines). |