“…8 Despite the predominant hydrophobic nature, silk can be obtained in water-soluble amorphous form (silk I) which has a predominantly random coil conformation and can be processed into films, gels, fibers, microspheres, and scaffolds. 8,9 . Silk I is metastable and undergoes molecular rearrangement into water-insoluble β-sheet–rich crystalline form (Silk II) upon spinning, drying, exposure to alcohols, and environmental changes.…”