Editing Red blood cell (section)

===Surface electrostatic potential===
The [[zeta potential]] is an electrochemical property of cell surfaces that is determined by the net electrical charge of molecules exposed at the surface of cell membranes of the cell. The normal zeta potential of the red blood cell is −15.7&nbsp;milli[[volt]]s (mV).<ref name=Tokumasu2012>Tokumasu F, Ostera GR, Amaratunga C, Fairhurst RM (2012) Modifications in erythrocyte membrane zeta potential by ''Plasmodium falciparum'' infection. Exp Parasitol</ref> Much of this potential appears to be contributed by the exposed [[sialic acid]] residues in the membrane: their removal results in zeta potential of −6.06&nbsp;mV.