Comparison Of Collagen Characteristic From The Skin And Swim Bladder Of Gulf Corvina (Cynoscion Othonopterus)
TISSUE & CELL(2021)
摘要
Collagens extracted from different tissues and fish species display different physicochemical properties, thus novel sources require characterization. Gulf corvina (Cynoscion othonopterus) is processed industrially for food. Of the by-products, the swim bladder is used for fish maw, but other tissues are treated as waste. In the present study, pepsin-soluble collagen from Gulf corvina skin and swim bladder was extracted and characterized. Skin produced a higher collagen yield (82 +/- 1.53 %) than swim bladder (69 +/- 1.60 %). Both collagens exhibited electrophoresis bands corresponding to ([alpha 1(I]2 alpha 2(I)] and beta chains, all characteristic of type I collagen. Spectra analysis showed the collagens to maintain their triple-helix structure. The skin collagen had a lower denaturation temperature (29.8 degrees C) than the swim bladder collagen (32.5 degrees C), due to its relatively low imino acid content (168 vs. 190 /1000 residues, respectively). Both collagens were highly soluble in acidic pH ranges; Zeta potential values were 5.5 for the skin collagen and 6.2 for the swim bladder collagen. Gulf corvina skin and swim bladder are excellent sources of type I collagen with similar physicochemical properties.
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关键词
Gulf corvina, Skin, Swim bladder, Collagen characterization
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