THE CONSTITUENTS OF COD LIVER WITH VITAMIN B12 ACTIVITY FOR LACTOBACILLUS LEICHMANNII
Keyword(s):
The identity of the compounds that together form the total microbiological vitamin B12 activity of cod-liver residue was determined by a fractionation procedure involving ion exchange, countercurrent distribution, partition chromatography, and microbiological assay. The presence of cyanocobalamin, hydroxocobalamin, and the desoxyribosides of thymine, uracil, hypoxanthine, xanthine, and guanine was demonstrated. The total vitamin B12 activity, as determined by microbiological assay with Lactobacillus leichmannii, and its distribution in cod-liver residue, were very similar to those of beef liver. Cod-liver residues may be used to replace beef liver in vitamin B12 preparations.
1953 ◽
Vol 10
(2)
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pp. 64-68
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Keyword(s):
1951 ◽
Vol 76
(4)
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pp. 806-810
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1951 ◽
Vol 6
(1)
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pp. 25-38
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2008 ◽
Vol 12
(1)
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pp. 87-95
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1949 ◽
Vol 72
(2)
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pp. 515-521
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1989 ◽
Vol 36
(5)
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pp. 409-416
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Keyword(s):
1952 ◽
Vol 9
(3)
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pp. 164-168
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