5-Azacytidine 5′-triphosphate sodium

5-Azacytidine 5'-triphosphate sodium is a cytidine analog that selectively blocks the integration of cytidine triphosphate into RNA by DNA-dependent RNA polymerase in vitro, without interfering with uridine triphosphate incorporation. It is used in epigenetic research to study transcriptional inhibition and mechanisms of action in enzymatic assays.