Figure 2. Ribbon crystal structures of Shigella dysenteriae Shiga toxin (20), Escherichia coli heat-labile toxin I (LT-I) (21), and pertussis toxin (22). The Shiga toxin figure was contributed by Marie Frasier. The LT-I and pertussis figures were contributed by Ethan Merritt. The figures were drawn in MOLSCRIPT (75).
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