the results obtained with this phosphotransferase assay can , in part , be explained by the presence of thiamine triphosphate ( thtp ) in the preparation of thiamine diphosphate ( thdp ) used as a substrate , by the inhibition by atp of the thtp phosphohydrolase activity , present in fractions of rat brain homogenates , and by the stimulation by thdp of the atpase activity .
C0039853
thiamine triphosphate
C0039840
preparation