BX08 gp120 monomer dynamic electrophoretic fingerprint (DEF) shown as a three dimensional wireframe model. Bolded line represents zero electrophoretic mobility (LZM). A single LZM is observed in the most acidic and lowest conductivity conditions, Mobility is less than zero under nearly all pH/pλ combinations. The fingerprint reaches a minimum of −2.4 μmcm/Vs at the most alkaline. The DEF exhibits the twisted ribbon shape seen with other biological surfaces. Data were plotted using direct linear interpolation.