F. Watanabe et al., Characterization of a vitamin B-12 compound in the edible purple laver, Porphyra yezoensis, BIOS BIOT B, 64(12), 2000, pp. 2712-2715
The edible purple lever, Porphyra yezoensis, contained 51.49+/-1.51 mug of
vitamin Bit compounds per 100 g dry weight of the laver (mean +/- SEM, n =
4). A vitamin B-12 compound was purified from the lyophilized purple laver
and partially characterized. The silica gel 60 TLC and reversed-phase HPLC
patterns of the purified pink-colored compound were identical to those of a
uthentic vitamin B-12, but not to those of vitamin B-12 analogues inactive
for humans.