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. 2004 Oct 15;88(1):392–403. doi: 10.1529/biophysj.104.040113

FIGURE 2.

FIGURE 2

Molar conductivity of the spermine salt reduced by its valence (z = 4) as a function of the inverse of the Debye screening length κ. Measurements were done at 20–25°C. Spermine salt (with no DNA) was diluted in: distilled water (•),10 mM TE buffer (○), and 200 mM NaCl (▪). The contribution of the monovalent salts has been subtracted to display the molar conductivity of the spermine salt only. The straight line represents the variation predicted by the Debye-Hückel-Onsager theory in its limiting form when ions are fully dissociated.