Characterization of a Corrinoid Compound in the Edible (Blue-Green) Alga, Suizenji-nori

  • WATANABE Fumio
    School of Agricultural, Biological and Environmental Sciences, Tottori University
  • MIYAMOTO Emi
    Department of Health and Nutrition, Nagasaki International University
  • FUJITA Tomoyuki
    Graduate School of Agriculture, Shinshu University
  • TANIOKA Yuri
    Graduate School of Life and Environmental Science, Osaka Prefecture University
  • NAKANO Yoshihisa
    Graduate School of Life and Environmental Science, Osaka Prefecture University

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The edible blue-green alga (cyanobacterium), Suizenji-nori, contained 143.8±22.4 μg of vitamin B12 per 100 g dry weight of the alga (mean±SE, n=4). A corrinoid compound was purified from the dried Suizenji-nori, and partially characterized. The silica gel 60 TLC and reversed-phase HPLC patterns of the purified corrinoid compound were not identical to those of true vitamin B12, but to those of pseudovitamin B12 which is inactive for humans.

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