9:45 AM. 137. Photo-Tunable Materials Reveal Dynamic Role of YAP Mechanotransduction During Intestinal Crypt Formation.Nolan Petrich, B.S.1, Kaustav Bera, Ph.D.1, Delaney McNally, B.S.1, Peter Dempsey, Ph.D.2, Kristi Anseth3 1University of Colorado Boulder, 2University of Colorado Anschutz Medical Campus, 3University of Colorado at Boulder