A linear amphoteric poly(amidoamino acid), L‐ARGO7, is prepared by Michael‐type polyaddition of L‐arginine with N,N′‐methylenebisacrylamide. Chain‐extension of acrylamide end‐capped L‐ARGO7 oligomers with piperazine leads to high‐molecular‐weight copolymers in which L‐arginine maintains its absolute configuration. Acid/base properties of L‐ARGO7 polymers show isolectric points of ≈10 and positive...
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