following simulataneous exposure of cells for 5 min to 30 microm [ 6-3h ] fura and increasing concentrations of either thymine or uracil , dihydrofluorouracil ( fuh2 ) levels decreased in a concentration-dependent manner , and the concentration determined for 50 % inhibition of fura catabolism was 8.0 +/- 0.3 ( s.d . ) and 67.8 +/- 15.6 microm for thymine and uracil , respectively .
C0040087
thymine
C0041917
uracil