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. Author manuscript; available in PMC: 2016 Feb 3.
Published in final edited form as: J Am Chem Soc. 2015 Nov 12;137(46):14705–14715. doi: 10.1021/jacs.5b08395

Figure 3.

Figure 3

Neutralization of a 24-bp DNA (charge −46) by NaBr. The number of associated Na+ ions (●) and the excluded Br− ions (▲) give the total charge of the ion atmosphere (■, Γi, eq 1). The dashed line at +46 represents charge neutrality and the dotted line at zero represents the absence of an ion excess. The solid line connecting data points are provided as guides. Each data point is the average of 3–5 independent repeats. Error bars are shown when not smaller than the symbols. See Table S3 for raw data.