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Total ATP content in hydrogels prepared with different levels of degradable macromer expressed as percent of the 0% degradable condition at the 0 h time point. Cells incorporated into higher percent degradable hydrogels do not experience the same loss of viability as cells incorporated into a nondegrading (0%) hydrogel, which decrease in viability over time. Values significantly different from the time-matched 0% degradable condition are indicated as follows: *p < 0.05; #p < 0.01.
