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Determination of the HHQ metalloamyloid structure by structural bioinformatics. His Nδ1-Zn fragments from natural proteins (Top) that are consistent with the SSNMR data of HHQ were docked onto a β-sheet backbone (PDB code: 1YJP). A complete solution to the SSNMR constraints of HHQ is found and produces an infinite zigzag of Zn2+ (purple shade). S (single) and D (double) refer to the coordination number of the His. Zn2+ atoms are shown as spheres.
