In-cell nano-3D printer: Synthesizing stable filaments from in-cell protein crystals

Proteins are undoubtedly some of the most fascinating biomolecules, and they perform many of the functions that (in our eyes) separate life from inanimate matter. Multi-molecular protein assemblies even have large-scale structural functions, as evidenced by feathers, hair, and scales in animals. It should come as no surprise that, with progress in advanced nanotechnology and bioengineering, artificial protein assemblies have found applications in a variety of fields, including catalysis, molecular storage, and drug delivery systems.