Fig. 7

The release profiles of BMP-2 from BOX hydrogels with different copolymer concentrations. a The amounts of BMP-2 released from 15, 20, 25 and 30 wt% BOX hydrogels at indicated incubation time points were determined by reversed-phase HPLC. Soluble BMP-2 in the solution (PBS) for different time periods was also included in the study. b The release profiles of BMP-2 were plotted after the amounts of BMP-2 released from BOX hydrogels were normalized with the amounts of free BMP-2 in the solution at the corresponding time points