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Sequence alignment of the NTNH proteins associated with BoNT/A1(B). The sequence coverage of NTNH-A is depicted in bold and green, and the sequence coverage of NTNH-B is depicted in bold and blue. The MS/MS of the underlined peptides are in Figure 4, and the sections largely responsible for binding to HA-70 in BoNT/A HA+ progenitor toxin complexes are highlighted.
