[Metabolism of uridine triphosphate in rat liver]

Thiamin - a predecessor of transketolase coenzyme is shown to cause an increase in the intensity of labelled 14C orotic acid incorporation into UDP and UTP of the rat liver though the time of UTP exchange remains unchanged. Taking into account the data obtained, an assumption is advanced that the biosynthesis of pentoses in the pentosophosphate way of carbohydrates transformation in the rat liver proceeds in its non-oxidative branch with transketolase and transaldolase participating in the process.