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The L1-L3 interface of each MLD displays a positive charge. (A) Cartoon representation of MLDPMT for orientation of the diagrams in B. (B) Electrostatic potential predictions for two faces of the crystallized MLDs (PMT, TcdB, and TcsL) and the modeled MLDs (VvDUF5, VcRID, and VvRID). All of the predictions indicate a net positive charge (blue) at the interface of L1 and L3 although the remainder of the helical bundles contain large patches of negative charge (red).
