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(a) Hydrodynamic radius (Rh, ○) and photon counting rate which indicates light scattering intensity (△) for the PICsome composed of P20M190 and P20A196 as a function of f+ (= [MAPTAC]/([MAPTAC] + [AMPS])) in 0.1 M NaCl; (b) ζ-potential for PICsome as a function of f+ in 0.1 M NaCl. Total polymer concentration was fixed at 0.5 g/L.
