Abstract
It was previously found that reaction between 6, 7-dimethylribolumazine and a crude enzyme prepared from the mycelium of Er. ashbyii produced riboflavin and 6-methyl-7-hydroxyribolumazine and reported that the enzymic reaction yielded a considerable amount of riboflavin without addition of any carbon donor. Later, the products in the enzymic reaction were investigated by paper partition chromatography and a bluish green fluorescent spot with Rf 0.10 was detected besides the known substances, and the newly found substance was assumed to be the dimeride of 4-ribitylamino-5-aminouracil described in part XLI of this series.
