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Protein Quality of Fish in Modified Atmospheres as Predicted by the C‐PER Assay
Author(s) -
MOREY K. S.,
SATTERLEE L. D.,
BROWN W. D.
Publication year - 1982
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1982.tb04947.x
Subject(s) - sebastes , casein , fish <actinopterygii> , rockfish , food science , chemistry , amino acid , protein digestibility , protein quality , composition (language) , biology , zoology , chromatography , biochemistry , fishery , linguistics , philosophy
The nutritional quality of proteins from fillets of fresh rockfish ( Sebastes spp) stored in air or in a modified atmosphere (MA) of 80% CO 2 and 20% O 2 at 4°C was evaluated by the Computed Protein Efficiency Ratio (C‐PER) method. This procedure involves determination of in vitro digestibility and the amino acid composition of the samples prior to computation of the C‐PER. Casein was used as a standard. Both air‐held and MA‐held fish showed similar amino acid profiles, but the air‐held fish showed lower in vitro digestibility. The C‐PER values of both types of samples were higher than the C‐PER of 2.50 for standard casein. These results suggest that storage of fish in a modified atmosphere of 80% CO 2 and 20% O 2 does not result in deterioration in the nutritional quality of the fish proteins.