Abstract
1. Enzymatic transglycosidation relating to B2 was accelerated by irradiation of ultraviolet light.
2. Photochemical glycosidation of B2 was demonstrated by irradiating the reaction solution containing B2 and saccharide with ultraviolet light. The reaction optimally proceeded at about pH 4.2, and the action spectrum of the photoglycosidation was found to coincide with the absorption spectrum of B2. Lumiflavin inhibited the glycosidation in competition with B2.
3. The mechanism of the photoglycosidation was postulated in relation to that of the enzymatic transglycosidation.
