Polymethylene-Interrupted, Omega-3 and Branched-Chain Fatty Acids and Stable 13C Values of Wild Gulf of Mexico Oysters (Crassostrea virginica) from the Texas Coast

IF 5.7 1区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Journal of Agricultural and Food Chemistry Pub Date : 2025-03-15 DOI:10.1021/acs.jafc.4c11298

Zhen Wang, Tingxiang Yang, Hao Yang, Md Saydur Rahman, J. Thomas Brenna, Dong Hao Wang

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Abstract

The complex fatty acid (FA) composition of the edible portion of American oysters (Crassostrea virginica) presents a significant analytical challenge to complete characterization. Here, we employed solvent-mediated covalent adduct chemical ionization to enable comprehensive de novo characterization of its FA composition, with isotope ratio mass spectrometry for initial measurements of FA ¹³C signatures. Unusual polymethylene-interrupted (PMI) polyunsaturates were unequivocally identified, with 22:2(7Z,15Z) dominating at 5.5% (w/w). In contrast, sea urchins collected from the same area are abundant in shorter-chain-length C20 PMI-FA. Three even-numbered-chain anteiso branched-chain FAs (BCFAs), C14, C16, and C18, were characterized for the first time. Gulf oysters contain 1.8% total BCFA and 23.2% combined EPA and DHA. A 100 g serving of oysters provides 32.9 mg of BCFA; 140.1 mg of PMI-FA; and 426.9 mg of EPA and DHA. Oysters and sea urchins from the same origin exhibit significantly different δ¹³C values for most measured FA, indicating distinct dietary origins.

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来源期刊

Journal of Agricultural and Food Chemistry 农林科学-农业综合

CiteScore

9.90

自引率

8.20%

发文量

1375

审稿时长

2.3 months

期刊介绍： The Journal of Agricultural and Food Chemistry publishes high-quality, cutting edge original research representing complete studies and research advances dealing with the chemistry and biochemistry of agriculture and food. The Journal also encourages papers with chemistry and/or biochemistry as a major component combined with biological/sensory/nutritional/toxicological evaluation related to agriculture and/or food.