Utilization of labelled uridine, cytidine and orotic acid for determination of ribonucleic acid synthesis in mouse liver

Add time:08/06/2019    Source:sciencedirect.com

1.1. [3H]uridine and [3H]orotic acid were equally utilized for labelling of RNA in mouse liver. Incorporation of [3H]cytidine was 2–3 times as high as that of [3H]-labelled uridine or orotic acid.2.2. These results differ from findings in rat liver, where both cytidine and orotic acid are better utilized for RNA labelling than is uridine.3.3. The ratio between liver RNA [3H]-activity and volatile [3H]-activity was 2, 3 and 13, respectively, at 300 min after injection of labelled uridine, orotic acid and cytidine, indicating an efficient chanelling of cytidine into liver anabolic pathways.

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