54 Comparing the diffusion coefficients for soluble collagen type II in solution, the soft gel ( G ′ = 500 Pa), and the stiff gel ( G ′ = 3400 Pa), there is a clear trend that links the diffusion speed to the confinement of the environment ( Fig. 5 ).
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Effect of polyacrylamide gel elasticity on collagen type II fibril assembly.
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