Comprehensive Physicochemical Characterization and in Vitro Human Cell Culture Studies of an Innovative Biocompatible and Biodegradable Silk-Derived Protein Hydrolysate, SDP‑4 - Hasham Shafi; Andrea J. Lora; Saurabh Aggarwal; David W. Infanger; Brian D. Lawrence; Heidi M. Mansour (ACS Omega)