The Association of Vitamins in Related Biochemical Systems

The Association of Vitamins in Related Biochemical Systems 1. Vitamin A, Riboflavin, and Visteal Purple 

Although neither free nor phosphorylated riboflavin has an absorption spectrum similar to that of visual purple, Morton further recalls that intense red intermediate products are formed when riboflavin, or related compounds such as lumiflavin, are reduced in strongly acid solution (25,26). A red compound, presumably a flavin-pyridine-nucleotide, is moreover 

While there is thus ample evidence that these three members of the vitamin B complex all participate in carbohydrate metabolism, it would be an obvious fallacy to conclude that their activities are necessarily confined only to this sphere. Thus the coenzyme concerned in the oxidative deamination of a-amino acids (41) has been shown by Warburg and Christian (42) to be a dinucleotide containing riboflavin. Ratner, Nocito, and Green (43) have recently discovered an oxidase for glycine which is also a flavoprotein. 

The Interaction of Thiamine and Riboflavin as Studied in the Living Animal 

It may be recalled that early ivork by Hartwell (48) and by Reader and Drummond (49), before the recognition of the multiplicity of the vitamin B complex, showed that when the protein content of the basal diet was 

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