Polymethacrylate Copolymer N−C4−52−6.9 is a polymer that consists of hydrophobic butylmethacrylate and cationic methacroylcholine chloride monomers. Polymethacrylate Copolymer N−C4−52−6.9 is able to solubilise lipid bilayers into nanodiscs. Polymethacrylate Copolymer N−C4−52−6.9 can be utilized in structure and functional studies on membrane proteins.