Physicochemical changes of pepsin-solubilized and insoluble collagen in jumbo squid (Dosidicus gigas) muscle after cooking process

Autor: Josafat M. Ezquerra-Brauer, Enrique Márquez-Ríos, Betzabe E. López-Corona, Víctor M. Ocaño-Higuera, Hugo E. Ramírez-Guerra, Octavio Cota-Arriola, Wilfrido Torres-Arreola
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: International Journal of Food Properties, Vol 21, Iss 1, Pp 821-834 (2018)
Druh dokumentu: article
ISSN: 1094-2912
1532-2386
10942912
95854452
DOI: 10.1080/10942912.2018.1477159
Popis: Collagen is the major connective tissue (CT) protein and one of the main constituents of the jumbo squid (Dosidicus gigas). Therefore, physicochemical changes of pepsin-solubilized collagen (PSC) and insoluble collagen (IC) were studied after cooking (100°C/30 min) of muscle (mantle, fins, and arms). Different pyridinoline (Pyr) contents (the major cross-linking molecule in collagen fibers) were found in the fresh muscle of the three anatomical regions. After the cooking process, a decrease from 10 to 30% in the thermal resistance of collagen was observed, depending on the anatomical region and fraction evaluated. Furthermore, the electrophoretic profile, Fourier transform infrared (FTIR) spectroscopy, and the amino-acid profile revealed that structural changes occurred in the two different collagen fractions caused by the thermal process, and the changes were greater in the mantle. Under the conditions applied in this study, collagen fractions from the squid arms showed more stability during the cooking process due to the high cross-linking degree of their fibers.
Databáze: Directory of Open Access Journals
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