Temperature-Induced Structural Changes in Muscle Proteins from Giant Squid (Dosidicus gigas) Mantle: FT-IR, Circular Dichroism, and FE-SEM Analysis

The giant squid (Dosidicus gigas) is an abundant marine species with high protein content, making it a promising resource for the food and biomaterial industries. This study aimed to investigate the effect of temperature (25–100 ◦C) on the structural changes in sarcoplasmic, myofibrillar, and stromal proteins isolated from squid mantle. Fourier-transform infrared spectroscopy (FT-IR) and circular dichroism (CD) were employed to monitor modifications in secondary structure, while field emission...