抄録
The albino rats were kept on a riboflavin-deficient diet for one week to lower the riboflavin level in the intestinal mucosa. The intestine was excised and was soaked in Ringer's solution containing 5μg/ml each of riboflavin, FMN or FAD to observe the pictures of resorption. The following results were obtained.
1. Riboflavin is resorbed from the jejunum, whereby it is partly phosphorylated into FMN in the area between Goligi and basal mitochondria in the mucous epithelia.
2. FMN is resorbed fairly well as riboflavin, but FMN is not phosphorylated in the mucous epithelia.
3. FAD is resorbed from the intestinal mucosa, though it is relatively small in amount.
