Denaturation of gelsolin WT and D187N S2 and WT, D187N, and D187Y
S2loop as a function of urea concentration. Data are shown in black
circles for the WT, in red triangles for D187N, and in blue squares for
D187Y. Solid lines represent the best fits to Eq. 3 via a
nonlinear least squares analysis. (A) Denaturation of
gelsolin S2 WT and D187N monitored by fluorescence intensity at 341 nm
(10% glycerol, 4°C). (B) Urea-induced denaturation of
gelsolin S2loop WT, D187N, and D187Y monitored by CD ellipticity at 217
nm (4°C).