PEG-Immobilized Keratin for Protein Drug Sequestration and pH-Mediated Delivery

Figure 2

Preparation of scaffolds: (a) keratin gelation via disulfide bond formation of intermolecular chains, (b) photopolymerization reaction to increase polyethylene glycol molecular weight and to crosslink to keratin, (c) freezing, and (d) lyophilization to remove unbound water, finally producing PEG and KTN-PEG constructs.

(a)

(b)

(c)

(d)