Immunogen
Synthesized peptide derived from human Claudin 18
Specificity
The antibody can specifically recognize both human Claudin 18.1 and Claudin 18.2 protein.
Formulation
Liquid in PBS containing 50% glycerol, 0.5% BSA and 0.155% sodium azide.
Dilution rate
IHC-p 1:100-500, IF 1:100-500
Purification process (Immunogen)
The antibody was affinity-purified from mouse ascites by affinity-chromatography using specific immunogen.
Background
This gene encodes a member of the claudin family. Claudins are integral membrane proteins and components of tight junction strands. Tight junction strands serve as a physical barrier to prevent solutes and water from passing freely through the paracellular space between epithelial or endothelial cell sheets, and also play critical roles in maintaining cell polarity and signal transductions. This gene is upregulated in patients with ulcerative colitis and highly overexpressed in infiltrating ductal adenocarcinomas. PKC/MAPK/AP-1 (protein kinase C/mitogen-activated protein kinase/activator protein-1) dependent pathway regulates the expression of this gene in gastric cells. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jun 2010],
Function
function:Plays a major role in tight junction-specific obliteration of the intercellular space, through calcium-independent cell-adhesion activity.,similarity:Belongs to the claudin family.,tissue specificity:Concentrated at the cell-cell borders of epithelial cells.,
Gene Name
CLDN18 UNQ778/PRO1572
Fields
>>Cell adhesion molecules;>>Tight junction;>>Leukocyte transendothelial migration;>>Pathogenic Escherichia coli infection;>>Hepatitis C
Human protein sequence Database
P56856
Mouse protein sequence database
Rat protein sequence database
Cellular localization
Cell junction, tight junction . Cell membrane ; Multi-pass membrane protein . Localizes to tight junctions in epithelial cells. .
Tissue expression
Isoform A1: Expression is restricted to the lung (PubMed:19047087). Isoform A2: Expression is restricted to the stomach mucosa where it is predominantly observed in the epithelial cells of the pit region and the base of the gastric glands including exocrine and endocrine cells (at protein level) (PubMed:19047087).
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