Figure 1: Sorption and release profiles of VEGF for gelatin hydrogel sheets. (A) Amount of VEGF incorporated gelatin hydrogel sheets as a function of VEGF added. (B) Release profile of VEGF from gelatin hydrogel sheets incorporating VEGF at 37°C in PBS. After 24 hr at release test in PBS, PBS is changed to PBS containing collagenase indicated by an arrow.