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Key Documents

04-1570-I

Sigma-Aldrich

Anti-RNA polymerase II subunit B1 (phospho-CTD Ser-7) Antibody, clone 4E12

culture supernatant, clone 4E12, from rat

Synonyma:

DNA-directed RNA polymerase II subunit RPB1, RNA polymerase II subunit B1, DNA-directed RNA polymerase II subunit A, DNA-directed RNA polymerase III largest subunit, RNA-directed RNA polymerase II subunit RPB1

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About This Item

UNSPSC Code:
12352203
eCl@ss:
32160702
NACRES:
NA.41

biological source

rat

Quality Level

antibody form

culture supernatant

antibody product type

primary antibodies

clone

4E12, monoclonal

species reactivity

mouse

species reactivity (predicted by homology)

human (based on 100% sequence homology)

technique(s)

ChIP: suitable
ELISA: suitable
western blot: suitable

isotype

IgG1κ

NCBI accession no.

UniProt accession no.

shipped in

wet ice

target post-translational modification

phosphorylation (pSer7)

Gene Information

human ... POLR2B(5431)

General description

RPB1 (RNA polymerase II subunit B1) is the catalytic component of RNA polymerase II which synthesizes mRNA and non-coding RNAs. During transcription, elongation is influenced by the phosphorylation status of the C-terminal domain (CTD) of RPB1, which acts as an assembly platform for factors regulating transcription initiation, elongation, termination and mRNA processing. Phosphorylation occurs mainly at residues ′Ser-2′ and ′Ser-5′ of the tandem 7 residue repeats in the C-terminal domain (CTD), which activates Pol II. This phosphorylation also can occur at ′Ser-7′ of the heptapepdtide repeat. This antibody recognizes the ′Ser-7′ CTD residue of RPB1.

Specificity

Demonstrated to react with human RBP1 in Ni et al., 2011. Transcription 2:5, 237-242
This antibody recognizes RNA polymerase II subunit B1 phosphorylated at Ser7 of the C-terminal domain (CTD).

Immunogen

Epitope: Phosphorylated Ser7 of the C-terminal domain (CTD)
Ovalbumin-conjugated linear peptide corresponding to human RNA polymerase II subunit B1 phosphorylated at Ser7 of the C-terminal domain (CTD).

Application

Anti-RNA polymerase II subunit B1 (phospho-CTD Ser-7) Antibody, clone 4E12 is a highly specific rat monoclonal antibody & that targets RNA Polymerase & has been tested in western blotting.
Chromatin Immunoprecipitation Analysis: A representative lot was used by an independent laboratory to immunoprecipitate RNA polymerase II subunit B1 (phospho-CTD Ser-5) in ChIP (Chapman, R., et al. (2007). Science. 318(5857):1780-1782.).
Demonstrated to react with human RBP1 in Ni et al., 2011. Transcription 2:5, 237-242

Quality

Evaluated by Western Blotting in untreated and lambda phosphatase treated NIH/3T3 cell lysate.

Western Blotting Analysis: A 1:2,000 dilution from a representative lot detected RNA polymerase II subunit B1 (phospho-CTD Ser-7) in 10 μg of untreated NIH/3T3 cell lysate.

Target description

~220 kDa observed

Linkage

Replaces: 04-1570

Physical form

Rat monoclonal IgG1κ with 0.05% sodium azide.

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Storage Class

10 - Combustible liquids

wgk_germany

WGK 1


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