|8683T||1 Kit (6 x 20 microliters)||
|CD2AP Antibody 2135||20 µl||
||H M R Mk||80||Rabbit|
|Claudin-1 (D5H1D) XP® Rabbit mAb 13255||20 µl||
||H Dg||20||Rabbit IgG|
|ZO-1 (D7D12) Rabbit mAb 8193||20 µl||
||H Mk||220||Rabbit IgG|
|ZO-2 Antibody 2847||20 µl||
||H M R Mk B Dg||150||Rabbit|
|ZO-3 (D57G7) XP® Rabbit mAb 3704||20 µl||
|Afadin (D1Y3Z) Rabbit mAb 13531||20 µl||
||H M R Mk Dg||205||Rabbit IgG|
|Anti-rabbit IgG, HRP-linked Antibody 7074||100 µl||
Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding the carboxy terminus of human γ-catenin protein or the sequence of human catenin δ-1 protein. Polyclonal antibodies are purified by protein A and peptide affinity chromatography. Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to the amino-terminal sequence of human α-E-catenin, the carboxy terminus of human claudin-1 protein, Arg1117 of human afadin protein or to residues surrounding Pro714 of human β-catenin protein.
Tight junctions, or zona occludens, form a continuous barrier to fluids across the epithelium and endothelium. They function in regulation of paracellular permeability and in the maintenance of cell polarity, blocking the movement of transmembrane proteins between the apical and basolateral cell surfaces (reviewed in 1). Tight junctions are composed of claudin and occludin transmembrane proteins, which join the junctions to the cytoskeleton (1,2). The claudin family is composed of 23 integral membrane proteins, and their expression, which varies among tissue types, may determine both the strength and properties of the epithelial barrier (2,3). Zona occludens proteins ZO-1, -2, and -3 (also known as TJP1, 2, and 3) are peripheral membrane adaptor proteins that link junctional transmembrane proteins such as occludin and claudin to the actin cytoskeleton (reviewed in 4). ZO-1 and ZO-2 are required for tight junction formation and function (5,6). In subconfluent proliferating cells, ZO-1 and ZO-2 have been shown to colocalize to the nucleus and play a role in transcriptional regulation (7-9). Exogenous expression of the amino terminal portion of ZO-3 exerts a dominant negative effect that interferes with assembly of tight junctions and adherens junctions (10). ZO-1 has been shown to interact with afadin prior to the formation of tight junctions (11). Recent work has also shown that afadin is involved in controlling the directionality of cell movement when it is localized at the leading edge of moving cells (12,13). CD2AP is a scaffolding protein that is thought to link membrane proteins to the cytoskeleton (14-16). It plays a role in the formation of tight junctions in specialized cell types such as the slit diaphragm of the kidney glomerulus (17). CD2AP is also involved in the immunological synapse between CD2-expressing T cells and antigen presenting cells (18). Research studies have shown that interaction between CD2AP and other cytoskeletal proteins may regulate the endocytosis of EGFR (16).
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