Effect of 5-fluoro- and 5-bromouracil substitution on the translation of human thymidylate synthase mRNA.

Page 16269, right column: The third sentence of the second paragraph should ready as follows: Furthermore, in some previous studies (4,5), the RNA directed activity was not maximized by the addition of thymidine to circumvent TS inhibition and thus much of the activity of FUra was probably TS-directed.