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The use of mechanically strained acrylamide/acrylate copolymers is reported as a new alignment medium for
biomacromolecules. Compared to uncharged, strained polyacrylamide gels, the negative charges of the acrylamide/
acrylate copolymer strongly alter the alignment tensor and lead to pronounced electroosmotic swelling. The
swelling itself can be used to achieve anisotropic, mechanical strain. The method is demonstrated for the alignment
of TipAS, a 17 kDa antibiotic resistance protein, as well as for human ubiquitin, where alignment tensors with an
AZZ,NH of up to 60 Hz are achieved at a gel concentration of 2% (w/v). The alignment can be modulated by the
variation of pH, ionic strength, and gel concentration. The high mechanical stability of the swollen gels makes it
possible to obtain alignment at polymer concentrations of less than 1% (w/v).

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