Figure 4

Chemical shift perturbation of Fag s 1 resonances upon titration with DHE. (a) CSP as a function of residue number at the highest titrated DHE concentration. Residues in green showed CSP higher than the mean plus one standard deviation. Black dots represent residues whose NH peaks does not appear in the HSQC even in the free state and blue peaks with signal overlaps (b) Spectra of selected residues in different DHE concentrations. (c) Residues mapped in (a) are colored green in the Fag s 1 structure and in yellow those that disappeared during titration (I38, I56, I91, L104, S118, Y120, and I127).