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  • 05-257 - Anti-p300 CT Antibody, clone RW128

05-257 Sigma-Aldrich

Anti-p300 CT Antibody, clone RW128

clone RW128, Upstate®, from mouse

Synonym: KAT3B

  •  eCl@ss 32160702

  •  NACRES NA.41



Related Categories Alphabetical Index, Antibodies, P-PA, Primary Antibodies
clone   RW128, monoclonal
biological source   mouse
application(s)   ChIP: suitable
  immunoprecipitation (IP): suitable
  western blot: suitable
species reactivity   rat, human, mouse
shipped in   dry ice
isotype   IgG1
Quality Level   100
antibody product type   primary antibodies
mfr. no.   Upstate®
NCBI accession no.   NM_001429
UniProt accession no.   Q09472
Gene Information   human ... EP300(2033)


General description

p300 (also EP300 or E1A binding protein p300) and CBP (also CREBBP or CREB binding protein) are two closely related transcriptional co-activating proteins (or coactivators). p300 and CBP interact with numerous transcription factors and act to increase the expression of their target genes.
p300 and CBP have similar structures. Both contain five protein interaction domains, the nuclear receptor interaction domain (RID), the CREB and MYB interaction domain (KIX), the cysteine/histidine regions (CH1 and CH3) and the interferon response binding domain (IBiD). In addition p300 and CBP each contain a protein or histone acetyltransferase (PAT/HAT) domain and a bromodomain that binds acetylated lysines and a PHD finger motif with unknown function.
p300 and CBP are thought to increase gene expression in three ways:
(1) by relaxing the chromatin structure at the gene promoter through their intrinsic histone acetyltransferase (HAT) activity
(2) by recruiting the basal transcriptional machinery including RNA polymerase II to the promoter
(3) by acting as adaptor molecules.


Recognizes p300 and co-immunoprecipitates E1A.


Epitope: C-terminus

GST-fusion to the C-Terminus of human p300


Research Category
Epigenetics & Nuclear Function

Research Sub Category

Chromatin Biology

RNA Binding Protein (RBP)

Use Anti-p300 CT Antibody, clone RW128 (Mouse Monoclonal Antibody) validated in ChIP, IP, WB to detect p300 CT also known as KAT3B.

Target description

300 kDa

Physical form

Format: Purified

Protein A Purified immunoglobulin in Protein A Purified immunoglobulin in PBS, pH 7.4, 0.05% sodium azide and 30% glycerol

Protein G Purified

Storage and Stability

Maintain for 2 years at -20°C from date of shipment. Aliquot to avoid repeated freezing and thawing. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.


routinely evaluated by immunoblot on HeLa nuclear extract

Analysis Note

Positive Control Included: HeLa Nuclear Extract (12-309)

Other Notes

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

Safety & Documentation

Safety Information

Safety Information for this product is unavailable at this time.
Protocols & Articles


Antibody Basics

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Keywords: Affinity chromatography, Centrifugation, Chromatography, Digestions, Direct immunofluorescence, Gene expression, High performance liquid chromatography, Immunofluorescence, Ion Exchange, Microscopy, Precipitation, Purification, Rheumatology, Scanning electron microscopy

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