Occludin Polyclonal antibody

Occludin Polyclonal Antibody for IF, IHC, IP, WB, ELISA

Host / Isotype

Rabbit / IgG


human, mouse , rat and More (3)





Cat no : 27260-1-AP


Occludin, OCLN

Tested Applications

Positive WB detected inHUVEC cells, HepG2 cells, mouse brain tissue, mouse colon tissue, mouse kidney tissue, mouse liver tissue, rat liver tissue, rat brain tissue
Positive IP detected inHUVEC cells
Positive IHC detected inhuman colon tissue, human breast cancer tissue, human kidney 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 inCaco-2 cells, MCF-7 cells

Recommended dilution

Western Blot (WB)WB : 1:5000-1:50000
Immunoprecipitation (IP)IP : 0.5-4.0 ug for IP and 1:200-1:1000 for WB
Immunohistochemistry (IHC)IHC : 1:2000-1:10000
Immunofluorescence (IF)IF : 1:400-1:1600
Sample-dependent, check data in validation data gallery

Product Information

27260-1-AP targets Occludin in WB, IP, IHC, IF, FC, ELISA applications and shows reactivity with human, mouse , rat samples.

Tested Reactivity human, mouse , rat
Cited Reactivityhuman, mouse, rat, bovine, pig, rabbit
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen Occludin fusion protein Ag26173
Full Name occludin
Calculated molecular weight 522 aa, 59 kDa
Observed molecular weight 59 kDa
GenBank accession numberBC029886
Gene symbol OCLN
Gene ID (NCBI) 4950
Conjugate Unconjugated
Form Liquid
Purification Method Antigen 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

Occludin is an integral membrane protein located at the tight junction. It is a tetraspanin protein with four transmembrane domains, intracellular N and C termini and two extracellular loops. Occludin plays a role in the formation and regulation of the tight junction paracellular permeability barrier. Occludin can exist in different isoforms, owing to modifications at the posttranscriptional and posttranslational levels, the monomeric occludin migrates as 53-65 kDa on SDS-PAGE (PMID: 22083955; 19457074).


Product Specific Protocols
WB protocol for Occludin antibody 27260-1-APDownload protocol
IHC protocol for Occludin antibody 27260-1-APDownload protocol
IF protocol for Occludin antibody 27260-1-APDownload protocol
IP protocol for Occludin antibody 27260-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols




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


Iram (Verified Customer) (06-13-2022)

Excellent antibody for immunoblotting

  • Applications: Western Blot
  • Primary Antibody Dilution: 1:2000
  • Cell Tissue Type: colon cancer cells

Balawant (Verified Customer) (05-08-2022)

This antibody I have used and is working great . 1:2000 dilution is working great for the cell line (Colonic epithelialcellr of human).

  • Applications: Western Blot
  • Primary Antibody Dilution: 1:2000
  • Cell Tissue Type: Human colonic epithelial cells and mice colon tissue

Kushal (Verified Customer) (03-14-2022)

  • Applications: Western Blot, Immunoprecipitation, ChIP
  • Primary Antibody Dilution: 1.2000
  • Cell Tissue Type: Surgical human tissue, mouse tissue, Caco-2 cells