Figure 7.

Increased concentration of affinity peptides increases release of encapsulated TGFβ₁ from PEG (M_n = 10000 Da) hydrogels. For both (a) WSHW and (b) KRIWFIPRSSWY peptides, high concentrations of peptide (R = 10000) results in maximum release of encapsulated TGFβ₁. For KRIWFIPRSSWY, 100% fractional release is achieved in 1 day at R = 10000, while R = 100 gels only released 6.4 ± 1% over a 2 day time span. For WSHW gels, R = 10000 gels achieved 58.8 ± 5% release in 2 days, while R = 100 gels only released 10.6 ± 1% of their payload in the same time. Error bars represent standard error (n = 4).