Spectral Properties and Stabilities of Wt apoA-I and the Gly26Arg and Lys107-0 mutants at 0.1 mg/mL, pH 7.4.

aWavelength of maximum fluorescence of Trp residues, determined from the from the intrinsic fluorescence spectra as shown in Figure 1.band c Free energy change of unfolding and GndHCl concentration at which half of the protein is unfolded, respectively, calculated from equilibrium unfolding curves as described previously [8] and shown in Figure 2 (see “Methods").dStern-Volmer quenching constant (see “Methods").