Characteristics and functional properties of gelatin extracted from squid (Loligo vulgaris) skin
Abdelmalek, Baha Eddine | Gómez-Estaca, Joaquín | Sila, Assaâd | Martinez-Alvarez, Oscar | Gómez-Guillén, M. Carmen | Chaabouni-Ellouz, Semia | Ayadi, Mohamed Ali | Bougatef, Ali
The characteristics and functional properties of gelatin extracted from squid skin (Loligo vulgaris), using commercial pepsin at a level of 15 Units/g skin, were investigated. The gelatin extraction yield was 6.82 g/100 g wet basis, showing high protein content and low fat and ash contents. SDS-PAGE of squid skin gelatin showed high band intensity for the major protein components, especially, α- and β-components. The amino acid profile of squid skin gelatin showed a high percentage of imino acids, essential amino acids and hydrophobic amino acids. Fourier transformed infrared spectroscopy (FT-IR) spectra showed helical structure. Squid skin gelatin was able to form a completely thermo-reversible gel. Gelatin possessed interesting functional properties, which were governed by gelatin concentration.
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