Desoxycytidylic acid

Ion-exchange separation of such digests shows the presence of four major components corresponding to the adenine, guanine, thymine, and cytosine nucleotides." They are believed to be the four nucleoside 5 -phosphates for the following reasons Desoxyadenylic acid behaves identically with adenosine-5 -phosphate on the ion-exchange column. Desoxycytidylic acid and synthetic cytidine-5 -phosphate likewise behave in an identical fashion. All four desoxynucleotides are split by 5-nucleotidase purified from bull semen, which is specific for nucleotides containing phosphate esterified at carbon 5 (see below). Finally, desoxyadenylic acid yields ammonia on incubation with Schmidt s deaminase, which also acts on adenosine-5 -phosphate but not adenosine-3 -phosphate. 

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