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The cotangent compressive modulus is shown for protein polymer gels, including (a) LysB10, black; LysB10-GTA, light gray; and LysB10-hydrazone, dark gray. The moduli of the three LysB10 variants were significantly different at compressive strains of 40% and higher (p<0.05). (b) Moduli of B9, black, and B9-hydrazone, gray, were significantly different at compressive strains of 30% and higher (p<0.05).
