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OCT4/POU5F1 Polyclonal antibody

OCT4/POU5F1 Polyclonal Antibody for WB, ELISA

Host / Isotype

Rabbit / IgG


human, mouse, rat and More (2)





Cat no : 11263-1-AP


Oct 3, Oct 4, OCT3, OCT3/4, OCT4, Octamer binding protein 3, Octamer binding protein 4, OTF 3, OTF3, OTF4, POU class 5 homeobox 1, POU5F1

Tested Applications

Positive WB detected inHEK-293 cells, MCF-7 cells, NCCIT cells, MDA-MB-231 cells, mouse brain tissue, U-251 cells, rat brain tissue, mouse embryo tissue
Positive IHC detected inhuman renal cell carcinoma tissue, human lung cancer tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
Positive IF detected inmouse eye tissue

Recommended dilution

Western Blot (WB)WB : 1:1000-1:5000
Immunohistochemistry (IHC)IHC : 1:50-1:500
Immunofluorescence (IF)IF : 1:50-1:500
It is recommended that this reagent should be titrated in each testing system to obtain optimal results.
Sample-dependent, Check data in validation data gallery.

Product Information

11263-1-AP targets OCT4/POU5F1 in WB, IP, ELISA applications and shows reactivity with human, mouse, rat samples.

Tested Reactivity human, mouse, rat
Cited Reactivityhuman, mouse, rat, goat, pig
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen OCT4/POU5F1 fusion protein Ag1794
Full Name POU class 5 homeobox 1
Calculated Molecular Weight 39 kDa
Observed Molecular Weight50-60 kDa
GenBank Accession NumberBC020712
Gene Symbol POU5F1
Gene ID (NCBI) 5460
Conjugate Unconjugated
Form Liquid
Purification MethodAntigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information


Octamer-binding protein 4 (OCT4), also known as POU5F1 or OCT3/4, is a member of the POU gene family and encoded by the human gene POU5F1 (POU domain class 5 transcription factor 1). OCT4 is a member of the Octamer class of transcription factors that recognize the 8-base pair consensus motif 5'-ATGCAAAT-3'. Expression of OCT4 is associated with an undifferentiated, pluripotent stem cell phenotype and tumors. OCT4 is also expressed in the developing brain, with the highest levels found in the cortex, olfactory bulb, and the hippocampus.

 What is the molecular weight of OCT4?

The molecular weight of OCT4 is 38 kDa.

 What are the isoforms of OCT4?

The human POU51F gene consists of five exons located on chromosome 6 and can generate three mRNA isoforms through alternative splicing - OCT4A, OCT4B, and OCT4B1 (PMID: 18787205). OCT4A and OCT4B1 orchestrate gene transcription in the nucleus supporting self-renewal and pluripotency maintenance in ESCs and embryonal carcinoma cells, whereas OCT4B is localized in the cytoplasm in various non-pluripotent cell types and cannot sustain self-renewal and pluripotency.

 What is OCT4's involvement in pluripotency and self-renewal?

OCT4 forms a trimeric complex with SOX2 and DNA to control the expression of genes involved with embryonic development, such as FGF4 (PMID: 10801796), UTF1 (PMID: 10409735), or even NANOG (PMID: 15743839). OCT4 is critical for early embryogenesis (PMID: 9814708) and for embryonic stem cell pluripotency (PMID: 16153702). High levels of OCT4 are associated with the ability to self-renew, which is emphasized by OCT4 gene knockdowns promoting differentiation (PMID: 10742100). OCT4 is also one of the four key transcription factors used to generate induced pluripotent stem cells (iPSCs) by reprogramming fibroblasts to a pluripotent state (PMID: 16904174).


Product Specific Protocols
WB protocol for OCT4/POU5F1 antibody 11263-1-APDownload protocol
IHC protocol for OCT4/POU5F1 antibody 11263-1-APDownload protocol
IF protocol for OCT4/POU5F1 antibody 11263-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols



Mol Cell

Temporal proteomics during neurogenesis reveals large-scale proteome and organelle remodeling via selective autophagy

Authors - Alban Ordureau

Bone Res

Type II collagen-positive progenitors are important stem cells in controlling skeletal development and vascular formation.

Authors - Xinhua Li

J Pineal Res

Melatonin inhibits the stemness of head and neck squamous cell carcinoma by modulating HA synthesis via the FOSL1/HAS3 axis

Authors - Xinyue Luo


Carcinoma-associated fibroblasts promote the stemness and chemoresistance of colorectal cancer by transferring exosomal lncRNA H19.

Authors - Jing Ren

Mol Ther

Exosomal miR-1246 from glioma patient body fluids drives the differentiation and activation of myeloid-derived suppressor cells.

Authors - Wei Qiu

Environ Pollut

Wnt10a downregulation contributes to MEHP-induced disruption of self-renewal and differentiation balance and proliferation inhibition in GC-1 cells: Insights from multiple transcriptomic profiling

Authors - Yifan Hong


The reviews below have been submitted by verified Proteintech customers who received an incentive forproviding their feedback.


Zhiping (Verified Customer) (06-21-2023)

This antibody works well for WB.

  • Applications: Western Blot
  • Primary Antibody Dilution: 1:1000

Udesh (Verified Customer) (11-18-2022)

Worked well in Osteosarcoma U2OS cells. 20ug protein loaded. Dilution 1:2000 in 5% NFDM.

  • Applications: Western Blot
  • Primary Antibody Dilution: 1:2000
  • Cell Tissue Type: U2OS cells
OCT4/POU5F1 Antibody Western Blot validation (1:2000 dilution) in U2OS cells (Cat no:11263-1-AP)

Gongsheng (Verified Customer) (11-02-2022)

This antibody works well in WB, diluation 1:1000, incubation at +4 °C.

  • Applications: Western Blot
  • Primary Antibody Dilution: 1:1000
  • Cell Tissue Type: 293T

Silvia (Verified Customer) (10-19-2021)

It works well for Immunofluorescence on hiPSCs

  • Applications: Immunofluorescence
  • Primary Antibody Dilution: 1:500