In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
Tyramide Signal Amplification (TSA)
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Phos Binding Reagent Acrylamide
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
Cell Counting Kit-8 (CCK-8)
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
SYBR Safe DNA Gel Stain
Safe and sensitive stain for visualization of DNA or RNA in agarose or acrylamide gels.
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
5, 6-dichloro-1-β-D-ribofuranosylbenzimidazole (DRB) is a transcriptional elongation inhibitor.
Cyclin-dependent kinases (CDKs) belong to a family of protein kinases involved in regulating the cell cycle, transcription, mRNA processing, and the differentiation of nerve cells. They are expressed in all known eukaryotes. With cyclin, CDK shows kinase activity. CDKs are serine-threonine kinases .
DRB inhibited the activity of several carboxyl-terminal domain (CTD) kinases including casein kinase II, Cdk7, Cdk8, and Cdk9 with the IC50 of 4-10 μM, ~20 μM, ~20 μM, and 3 μM) [2-5]. In HeLa cells, DRB (75 μM) inhibited 60-75% of nuclear heterogeneous RNA (hnRNA) synthesis. DRB (75 μM) reduced the appearance of labeled cytoplasmic poly(A)-containing messenger RNA (mRNA) by approximately 95%. DRB inhibited the initiation of hnRNA chains, but did not directly interfere with labeling of poly(A) . DRB inhibited influenza virus multiplication in the chorioallantoic membrane in vitro . DRB inhibited a HeLa protein kinase whihc phosphorylated an RNA polymerase II-derived peptide . DRB can also inhibit HIV transcription (IC50 = ~4 μM) by targeting elongation enhanced by the HIV-encoded transactivator Tat.
. Zandomeni, R.O. Kinetics of inhibition by 5,6-dichloro-1-β-D-ribofuranosylbenzimidazole on calf thymus casein kinase II. Biochemistry Journal 262, 469-473 (1989).
. Yankulov, K.,Yamashita, K.,Roy, R., et al. The transcriptional elongation inhibitor 5,6-dichloro-1-β-D-ribofuranosylbenzimidazole inhibits transcription factor IIH-associated protein kinase. The Journal of Biological Chemisty 270(41), 23922-23925 (1995).
. Rickert, P.,Corden, J.L., and Lees, E. Cyclin C/CDK8 and cyclin H/CDK7/p36 are biochemically distinct CTD kinases. Oncogene 18, 1093-1102 (1999).
. Schang, L.M. Cyclin-dependent kinases as cellular targets for antiviral drugs. Journal of Antimicrobial Chemotherapy 50, 779-792 (2002).
 Sehgal P B, Darnell J E, Tamm I. The inhibition of DRB (5, 6-dichloro-1-β-d-ribofuranosylbenzimidazole) of hnRNA and mRNA production in HeLa cells[J]. Cell, 1976, 9(3): 473-480.
 Tamm I, Tyrrell D A J. Influenza virus multiplication in the chorioallantoic membrane in vitro: kinetic aspects of inhibition by 5, 6-dichloro-1-β-D-ribofuranosylbenzimidazole[J]. The Journal of experimental medicine, 1954, 100(6): 541.
 Stevens A, Maupin M K. 5, 6-Dichloro-1-β-d-ribofuranosylbenzimidazole inhibits a HeLa protein kinase that phosphorylates an RNA polymerase II-derived peptide[J]. Biochemical and biophysical research communications, 1989, 159(2): 508-515.
|Storage||Store at -20°C|
|Solubility||≥12.6mg/mL in DMSO|
|Canonical SMILES||O[[email protected]@H]1[[email protected]](O)[[email protected]@H](CO)O[[email protected]]1N2C=NC3=C2C=C(Cl)C(Cl)=C3|
|Shipping Condition||Evaluation sample solution : ship with blue ice.All other available size: ship with RT , or blue ice upon request|
|General tips||For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.|