The separation of all the 5'-mono-, di- and triphosphates of ara-C and ara-U by thin-layer (TLC) and high pressure liquid chromatography (HPLC) is described. Whereas for the TLC two different systems are necessary, HPLC allows a rapid separation of all the nucleotides with high resolution, reproducibility, and sensitivity within 15 minutes. An example of an HPLC separation of ara-C and ara-U nucleotides derived from a biological sample is presented.
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Kreis et al. (1976) studied this question.
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