Gas chromatography-mass spectrometry of lysinoalanine and the related crosslinked amino acids in alkali-treated food proteins.

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概要

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• Mass spectra of N-trifluoroacetyl n-butyl ester (BTFA) of ornithinoalanine (OAL) and lanthionine (LAN) were compared with those of the BTFA derivatives of lysinoalanine (LAL) and the related amino acids. A difference of m/z 14, corresponding to one methylene group, was found in each pair of characteristic fragments between BTFA-OAL and BTFA-LAL. A temperature-programmed gas-liquid chromatography and gas chromatography-mass spectrometry were developed to analyze BTFA-LAN, BTFA-OAL and BTFA-LAL. More LAL and LAN were formed in α-lactalbumin than lysozyme by high-temperature treatment in water. OAL was detected in lysozyme treated at 100° and 120°C in alkali solution, but not in α-lactalbumin.

• 公益社団法人 日本農芸化学会の論文

著者

• HASEGAWA Kiyozo

  Department of Food Science and Nutrition, Nam Womens University

関連論文

• Gas chromatography-mass spectrometry of lysinoalanine and the related crosslinked amino acids in alkali-treated food proteins.

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