FIGURE 8.
Comparison of pH-dependent membrane insertion of the hydrophobic helical hairpins of the T-domain and Bcl-xL. A) The membrane insertion of the T-domain into LUV, determined as a function of the pH, strongly depends on the mole fraction of POPG in the LUV (only fitting curves from reference (13) are shown). B) The membrane insertion of Bcl-xL, studied as a function of the pH by following the changes in emission intensity at 525 nm, does not strongly depend on the POPG content of LUV (data in 90PC/10PG is omitted since there is no initial binding of the protein to LUV with this lipid composition). The data was fitted to a two-state model as described in methods.