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Subagio A, Morita N, Sawada S. Thermal Isomerization of All-trans-Lutein in a Benzene Solution. Biosci Biotechnol Biochem. 1998;62(12):2453-6doi: 10.1271/bbb.62.2453.
Subagio, A., Morita, N., & Sawada, S. (1998). Thermal Isomerization of All-trans-Lutein in a Benzene Solution. Bioscience, biotechnology, and biochemistry, 62(12), 2453-6. https://doi.org/10.1271/bbb.62.2453
Subagio, A, et al. "Thermal Isomerization of All-trans-Lutein in a Benzene Solution." Bioscience, biotechnology, and biochemistry vol. 62,12 (1998): 2453-6. doi: https://doi.org/10.1271/bbb.62.2453
Subagio A, Morita N, Sawada S. Thermal Isomerization of All-trans-Lutein in a Benzene Solution. Biosci Biotechnol Biochem. 1998;62(12):2453-6. doi: 10.1271/bbb.62.2453. PMID: 27392404.
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Biosci Biotechnol Biochem. 1998;62(12):2453-6. doi: 10.1271/bbb.62.2453.

Thermal Isomerization of All-trans-Lutein in a Benzene Solution.

Bioscience, biotechnology, and biochemistry

A Subagio, N Morita, S Sawada

Affiliations

  1. a Laboratory of Food Chemistry, College of Agriculture, Osaka Prefecture University.
  2. b Faculty of Science and Technology, Kinki University.

PMID: 27392404 DOI: 10.1271/bbb.62.2453

Abstract

Four major cis-lutein isomers could be identified after thermal isomerization of all-trans-lutein in a benzene solution system; namely, 13'-, 13-, 9'- and 9-cis-luteins. Using both all-trans-lutein and a mixture of these purified cis-luteins as starting materials, the quantitative changes determined by HPLC response show that this thermal isomerization was a reversible reaction. The equilibrium constants (k C ) of 13'- and 13-cis-luteins were higher than those of 9'-, and 9-cis-luteins, suggesting that the amount formed of the former isomers was higher than that of the latter.

Keywords: carotenoid; isomerization; lutein

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