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Cartoon depicting the proposed self-association model for PbA in A5N. In 10 mM acetate, PbA remains monomeric. Upon addition of an isotonic amount of NaCl, at low to intermediate concentrations PbA (< 10 mg/mL), it exists as a mixture of dimeric to heptameric oligomers. At higher concentrations, PbA self-associates to form heptameric clusters.
