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Figure 1
Overall structure of full-length C. diphtheriae SpaD. Cartoon diagram showing the three-domain structure comprising D1 (light purple), D2 (green) and D3 (pink). Key features highlighted are the isopeptide bonds (cyan), Ca2+-binding site (green sphere), S—S bond (yellow), β1–β2 loop (magenta) and Lys179 (green).

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ISSN: 2059-7983
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