Immunocytochemistry analysis of Caco-2 stained with ABfinity™ Recombinant ZO-1 Rabbit Oligoclonal Antibody (2µg/mL) using a: Alexa Fluor® 488 goat anti-rabbit as a secondary antibody (green). b: DAPI stained Caco-2 cell nuclei (blue). c: Composite image of cells showing antibody staining membrane and tight junction. d: no primary control.
|Tested species reactivity||Human|
|Host / Isotype||Rabbit / IgG|
|Contains||0.09% sodium azide|
|Storage Conditions||Store at 4°C short term. For long term storage, store at -20°C, avoiding freeze/thaw cycles.|
|Tested Applications||Dilution *|
|Immunocytochemistry (ICC)||Assay Dependent|
|Immunofluorescence (IF)||Assay Dependent|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
Tight junctions are complexes of proteins that create intercellular boundaries between the plasma membrane domains of epithelial and endothelial cells. Many of the tight junction-associated proteins are members of the membrane- associated guanylate kinase (MAGUK) family and include occludin, ZO-1, ZO-2 and ZO-3. These proteins are thought to have both structural and signaling roles, and are characteristically defined by three protein-protein interaction modules: the PDZ domain, the SH3 domain and the guanylate kinase (GuK) domain. ZO-1 forms complexes with either ZO-2 or ZO-3. In addition, these proteins can also associate with claudin, occludin and F-actin, at tight junction stands, where they provide a linkage between the actin cytoskeleton and the tight junction. ZO-1 expression is significantly reduced in many breast cancer lines. ZO-2 and ZO-3 are ubiquitously expressed within epithelial tight junctions, and unlike ZO-1, which is also expressed at cell junctions of cardiac myocytes, ZO-2 is not expressed in nonepithelial tissue.
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