Figure EV5. FD20 destructs S‐2P trimer within 3–15 min.

• A
  Negative staining electron microscopy of S‐2P (a stable mutant of S, see Methods) without FD20 incubation.
• B–D
  Negative staining electron microscopy of S‐2P immediately after the addition of FD20 (B), or after 3 min (C) or 15 min (D) of FD20 incubation. Bars are indicated in each panel. Two representative images are shown for each treatment.