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. Author manuscript; available in PMC: 2014 Jul 7.
Published in final edited form as: Cold Spring Harb Symp Quant Biol. 2011 Nov 23;76:235–246. doi: 10.1101/sqb.2011.76.010694

Figure 1.

Figure 1

Chemical structure of uracil and its anticancer analog, 5-fluorouracil.