ELISA, Immunogen, SDS-PAGE, WB, Bioactivity testing in progress
Especies
Homo sapiens (Human)
Naturaleza
Recombinant
Nivel de endotoxinas
Please contact with the lab for this information.
Pureza
>90% as determined by SDS-PAGE.
Peso molecular predicho
44.50 kDa
Forma
Lyophilized
Buffer de almacenamiento
Lyophilized from a solution in PBS pH 7.4, 0.02% NLS, 1 mM EDTA, 4% Trehalose, 1% Mannitol.
Consulte la información específica del buffer en la copia impresa del datasheet o en el COA específico del lote.
Reconstitución
Reconstitute in sterile water for a stock solution. Adjust the volume of sterile water so that, after reconstitution, the final stock concentration matches the value indicated on the product label or datasheet.
RECONSTITUTION PROTOCOL
1. Allow the product to be reconstituted and the reconstitution diluent to reach room temperature.
2. Tap or briefly centrifuge the product vial before opening to dislodge any lyophilized material that may be dispersed on the wall or cap of the vial.
3. Use the diluent and stock concentration recommended in the product datasheet. If preparing a stock concentration higher than recommended, contact Technical Service.
4. After adding the diluent, re-cap the vial and invert gently by hand or place on a slow rocking platform to allow the reconstitution diluent to coat all the surfaces inside the vial. Note: Do not mix by vortexing or by pipetting the material up and down.
5. Allow the vial to sit at room temperature with gentle agitation for at least 15 minutes before aliquotting or using.
6. Store the reconstituted material in single use aliquots in polypropylene or siliconized tubes. Aliquots of 10 μL or larger are recommended.
Envío
In general, proteins are provided as lyophilized powder/frozen liquid. They are shipped out with dry ice/blue ice unless customers require otherwise.
Estabilidad y almacenamiento
Use a manual defrost freezer and avoid repeated freeze thaw cycles. Store at 2 to 8°C for frequent use. Store at -20 to -80°C for twelve months from the date of receipt.
Nombres alternativos
DEAD box protein 21, DDX21, Gu-alpha, Nucleolar RNA helicase II, RH II/Gu, Nucleolar RNA helicase Gu, Nucleolar RNA helicase 2
Fondo
Nucleolar RNA helicase 2 (DDX21) is a ~87 kDa protein. RNA helicase that acts as a sensor of the transcriptional status of both RNA polymerase (Pol) I and II: promotes ribosomal RNA (rRNA) processing and transcription from polymerase II (Pol II). Binds various RNAs, such as rRNAs, snoRNAs, 7SK and, at lower extent, mRNAs. In the nucleolus, localizes to rDNA locus, where it directly binds rRNAs and snoRNAs, and promotes rRNA transcription, processing and modification. Required for rRNA 2'-O-methylation, possibly by promoting the recruitment of late-acting snoRNAs SNORD56 and SNORD58 with pre-ribosomal complexes. In the nucleoplasm, binds 7SK RNA and is recruited to the promoters of Pol II-transcribed genes: acts by facilitating the release of P-TEFb from inhibitory 7SK snRNP in a manner that is dependent on its helicase activity, thereby promoting transcription of its target genes.
1. Calo, E. et al. (2015) Nature 518, 249-53. PMID: 25470060
2. Song, C. et al. (2017) Genes & development 31, 1370-1381. PMID: 28790157
3. Sloan, KE. et al. (2015) Nucleic acids research 43, 553-64. PMID: 25477391
4. Westermarck, J. et al. (2002) The EMBO journal 21, 451-60. PMID: 11823437
5. Zhang, Y. et al. (2014) Breast cancer research : BCR 16, 449. PMID: 25260534
6. Valdez, BC. et al. (1997) European journal of biochemistry 250, 800-7. PMID: 9461305
9. Treiber, T. et al. (2017) Molecular cell 66, 270-284.e13. PMID: 28431233
Nota
For research use only.
Imágenes
SDS-PAGE
SDS-PAGE for Recombinant Human DDX21 Protein, N-His
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