Extended Data Fig. 3: The C-terminus of DddAI abuts DddA.

X-ray crystal structure of the DddAI–DddA complex in ribbon and surface representation, respectively. The C-terminal amino acid of DddAI (Leu123) is colored red and shown in space filling representation to highlight its position against the surface of DddA. The figure highlights how a C-terminal epitope fusion to DddAI would weaken the interaction with DddA due to steric clash.