CD81 Polyclonal antibody

CD81 Polyclonal Antibody for WB, ELISA

Host / Isotype

Rabbit / IgG


Human and More (3)





Cat no : 27855-1-AP


CD81, CD81 antigen, CD81 molecule, S5.7, TAPA1, Tetraspanin 28, Tspan 28, TSPAN28

Tested Applications

Positive WB detected inRaji cells, Jurkat cells

Recommended dilution

Western Blot (WB)WB : 1:1000-1:4000
Sample-dependent, check data in validation data gallery

Published Applications

WBSee 6 publications below

Product Information

27855-1-AP targets CD81 in WB, IHC, ELISA applications and shows reactivity with Human samples.

Tested Reactivity Human
Cited Reactivity human, mouse, rat
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen CD81 fusion protein Ag27298
Full Name CD81 molecule
Calculated molecular weight 26 kDa
Observed molecular weight23 kDa
GenBank accession numberBC002978
Gene symbol CD81
Gene ID (NCBI) 975
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.

Background Information

CD81 (also known as TAPA1or TSPAN28) is a membrane protein of the tetraspanin superfamily, which are characterized by the presence of four conserved transmembrane regions. Many of these members are expressed on leukocytes and have been implicated in signal transduction, cell-cell interactions, and cellular activation and development. CD81 is involved in signal transduction and cell adhesion in the immune system (PMID: 9597125). CD81 has also been identified as en essential receptor for HCV (hepatitis C virus) (PMID: 21428934).


Product Specific Protocols
WB protocol for CD81 antibody 27855-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols



Stem Cells Int

Similar Repair Effects of Human Placenta, Bone Marrow Mesenchymal Stem Cells, and Their Exosomes for Damaged SVOG Ovarian Granulosa Cells.

Authors - Shuwen Chen

Cell Death Dis

TGF-β1-mediated exosomal lnc-MMP2-2 increases blood-brain barrier permeability via the miRNA-1207-5p/EPB41L5 axis to promote non-small cell lung cancer brain metastasis.

Authors - Dongming Wu

Aging (Albany NY)

Exosomal lncRNA LINC01711 facilitates metastasis of esophageal squamous cell carcinoma via the miR-326/FSCN1 axis.

Authors - Mei-Ling Xu

Exp Cell Res

Exosomes secreted from mesenchymal stem cells mediate the regeneration of endothelial cells treated with rapamycin by delivering pro-angiogenic microRNAs.

Authors - Weizong Wang

Oncol Rep

Plasma‑derived exosomal pyruvate kinase isoenzyme type M2 accelerates the proliferation and motility of oesophageal squamous cell carcinoma cells.

Authors - Lifei Yang

Biomed Pharmacother

Insight into the proteomic profiling of exosomes secreted by human OM-MSCs reveals a new potential therapy.

Authors - Chengfeng Xun