9:30 AM. 261. Cell Network Formation within Strain-Stiffening Bottlebrush Polymer Hydrogels.Monica Ohnsorg, PhD1, Nicole Friend, PhD2, Daniel Saeb2, Sophie Givens, PhD2, Kayla Mash2, Kristi Anseth3 1University of Wisconsin - Madison, 2University of Colorado, Boulder, 3University of Colorado at Boulder