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Abstract
Due to their biocompatibility, biodegradability, and low immunogenicity, recombinant spider silk proteins have a high potential for a variety of applications when processed into morphologies such as films, capsules, beads, or hydrogels. Here, hydrogels made of the engineered and recombinantly produced spider silk protein eADF4(C16) were analyzed in detail. It has previously been shown that eADF4(C16) nanofibrils self-assemble by a mechanism of nucleation-aggregation, providing the basis of silk hydrogels. We focused on establishing a reproducible gelation process by employing different protein concentrations, chemical crosslinking, and functionalization of eADF4(C16) with fluorescein. Fluorescein strongly influenced assembly as well as the properties of the hydrogels, such as pore sizes and mechanical behavior, possibly due to its interference with packing of silk nanofibrils during hydrogel formation.
Published Version
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