Date published: 2026-4-5

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NELF-E Inhibitors

NELF-E inhibitors comprise a diverse array of compounds targeting various stages of transcriptional regulation. These inhibitors act by interfering with the normal progression of RNA Pol II transcription, subsequently impacting the activity of NELF-E in the transcription elongation complex. Flavopiridol, for instance, inhibits CDK9, preventing the phosphorylation of RNA Pol II and subsequent release of NELF-E. Similarly, compounds like DRB, Actinomycin D, and Rifampicin disrupt transcription elongation, indirectly influencing NELF-E function. Additionally, α-Amanitin and its variant, amanullin, inhibit RNA Pol II directly, impacting the regulatory role of NELF-E in controlling RNA Pol II elongation and gene expression. Moreover, compounds such as Quercetin and CX-5461 target CDK9 and RNA Pol I, respectively, showcasing the versatility of NELF-E inhibitors in modulating different aspects of transcription. The intricate regulatory mechanisms of NELF-E make these inhibitors valuable tools for studying transcriptional pausing and RNA Pol II elongation. This chemical class provides researchers with a comprehensive toolkit to investigate the specific biochemical and cellular pathways influenced by NELF-E, offering insights into the broader landscape of transcriptional regulation.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Flavopiridol Hydrochloride

131740-09-5sc-207687
10 mg
$317.00
(2)

Flavopiridol, a potent CDK inhibitor, hinders the phosphorylation of RNA Pol II, thereby impeding the release of NELF-E from the transcription elongation complex. This interruption leads to transcriptional pausing and the inhibition of mRNA synthesis.

DRB

53-85-0sc-200581
sc-200581A
sc-200581B
sc-200581C
10 mg
50 mg
100 mg
250 mg
$43.00
$189.00
$316.00
$663.00
6
(1)

DRB is a selective inhibitor of transcription elongation, acting by preventing the transition of RNA Pol II from the initiation to the elongation phase. By impeding this process, DRB indirectly inhibits NELF-E function, contributing to the regulation of gene expression.

Actinomycin D

50-76-0sc-200906
sc-200906A
sc-200906B
sc-200906C
sc-200906D
5 mg
25 mg
100 mg
1 g
10 g
$74.00
$243.00
$731.00
$2572.00
$21848.00
53
(3)

Actinomycin D, a DNA-intercalating agent, disrupts transcription by inhibiting RNA Pol II. This disruption leads to the downregulation of NELF-E activity by preventing its association with the transcriptional machinery, consequently influencing the transcriptional pausing of RNA Pol II.

α-Amanitin

23109-05-9sc-202440
sc-202440A
1 mg
5 mg
$269.00
$1050.00
26
(2)

α-Amanitin is a potent inhibitor of RNA Pol II, leading to the blockade of mRNA synthesis. By disrupting the normal progression of transcription, α-Amanitin indirectly affects NELF-E by impeding its involvement in the regulation of RNA Pol II elongation, thereby influencing gene expression.

Triptolide

38748-32-2sc-200122
sc-200122A
1 mg
5 mg
$90.00
$204.00
13
(1)

Triptolide inhibits RNA Pol II transcription by interfering with the formation of the initiation complex. This disruption prevents the recruitment of NELF-E to the transcription elongation complex, subsequently impacting the modulation of gene expression by controlling RNA Pol II elongation.

Quercetin

117-39-5sc-206089
sc-206089A
sc-206089E
sc-206089C
sc-206089D
sc-206089B
100 mg
500 mg
100 g
250 g
1 kg
25 g
$11.00
$17.00
$110.00
$250.00
$936.00
$50.00
33
(2)

Quercetin, a flavonoid, inhibits CDK9, a component of the P-TEFb complex. By interfering with CDK9 activity, quercetin indirectly influences NELF-E function, preventing its dissociation from the transcription elongation complex and contributing to the regulation of RNA Pol II elongation.

Rifampicin

13292-46-1sc-200910
sc-200910A
sc-200910B
sc-200910C
1 g
5 g
100 g
250 g
$97.00
$328.00
$676.00
$1467.00
6
(1)

Rifampicin, an antibiotic targeting bacterial RNA Pol, also inhibits eukaryotic RNA Pol II. By disrupting transcription elongation, rifampicin indirectly affects NELF-E function, influencing its role in the regulation of RNA Pol II elongation and gene expression.

CX-5461

1138549-36-6sc-507275
5 mg
$245.00
(0)

CX-5461 inhibits RNA Pol I, leading to the disruption of ribosomal RNA synthesis. This disruption indirectly affects NELF-E by modulating the availability of ribosomal RNA, potentially influencing its role in the regulation of transcriptional pausing and RNA Pol II elongation.