Figure 3From: The pyrroloquinoline quinone biosynthesis pathway revisited: A structural approachOverview of the crystal structure of PqqB. (A) General overview of the whole protein shown as cartoon. (B) Whole protein as cartoon with conserved residues shown in sticks. (C) Close up view of the putative active site near the Zinc atom. (D) Protein surface of the putative active site.Back to article page