cationized ferritin
Ferritin, treated with dimethyl propanediamine, and used to show, in the electron microscope, the distribution of negative charge on the surface of a cell. The amount of cationic ferritin binding is very approximately related to the surface charge.

Dictionary of molecular biology. 2004.

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  • polycation — Macromolecule with many positively charged groups. At physiological pH the most commonly used in cell biology is poly L lysine; this is often used to coat surfaces thereby increasing the adhesion of cells (which have net negative surface charge) …   Dictionary of molecular biology

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