Figure 4.
Only unmodified Httex1 and the S13D and S16D mutants are able to undergo a transition from random coil to β-sheet structure upon aggregation. Shown are CD spectra of singly phosphorylated (at Ser-13 or Ser-16) mutant Httex1 and the corresponding phosphomimetic proteins at 0 h (A) and 24 h (B).