This assay has high sensitivity and excellent specificity for detecting Human TJP1 (Tight Junction Protein 1). The assay range is from 0.156 to 10 ng/ml (Sandwich kit) with a sensitivity of 0.059 ng/ml. There is no detectable cross-reactivity with other relevant proteins. Activity loss rate and accelerated stability test ect have been conducted to guarantee the best performance of the products after long storage and delivery.

• High sensitivity and specificity
• Perfect reproducibility and consistency across batches
• Quality control with three-level inspections
• Wide range of targets/species available
• Intra-assay: CV<10%; Inter-assay: CV<12%

Tight junction protein ZO-1 is a protein located on a cytoplasmic membrane surface of intercellular tight junctions. The encoded protein may be involved in signal transduction at cell-cell junctions. Two transcript variants encoding distinct isoforms have been identified for this gene. Tight junction (zonula occludens) protein-1 (TJP1), also referred to as ZO-1, is a 200 kDa protein located on a cytoplasmic membrane surface of vertebrate intercellular tight junctions. Willott et al., (1993) isolated a full-length cDNA sequence for human TJP1. Although the function of TJP1 is unknown, the cDNA sequence predicted a multi-domain signaling protein homologous to the product of the 'discs large-1' tumor suppressor gene of Drosophila  and several other membrane-associated proteins in mammals.