ALFAGEN, Your Long-Term Partner In Life-Science


CUSABIO is a National High-Tech Enterprise with research, production and sales in one. After 16 years of effort, CUSABIO has become a good partner to researchers through worldwide. We are dedicated to providing 60,000+ validated antibodies, 10,000+ recombinant proteins, 660+ cytokines and thousands of ELISA kits to global customers in the research fields of cancer, cell biology, immunology, neuroscience, epigenetics, etc. All kinds of our products can meet customers’ different demands in various scientific research fields.

What We Do

As a manufacturer of ELISA kits, Exosome isolation kits, antibodies, proteins and related reagents, our only mission is to provide the best products and related custom service to researchers so that they can have a good starting for the next breakthrough. CUSABIO’s high quality has been guaranteed by many published literatures in all kinds of famous journals, such as Science, Nature, Cell, Developmental Biology, Molecular Cell, Genes & Development, and so on. Now, the publications citing our products has reached more than 4,800, and hundreds of publications are updating every year.

CUSABIO has a sound platform for the development of assay kit, mature antigen-antibody research and development system. Assay kits offered by CASABIO are mainly two types, including ELISA kits and exosome isolation kits. We are proficient in a variety of ELISA technologies such as the double antibody sandwich method, double antigen sandwich method, direct competition ELISA method, indirect competition ELISA blocking method, indirect ELISA method, and other methods. And fine affinity purification technology for the production of Exosome Isolation Kits is also adopted.

Combined with the diagnostic kits development team, we are able to develop the ELISA kits with clinical diagnostic levels and make the quality in the leading place worldwide. Exosomes have been one of the research hotspots in recent years, and the separation technology of exosomes has been constantly updated and improved. After continuous improvement and repeated testing, we also developed high purity, high yield, and high-efficiency exosome isolation kits. CUSABIO now offers a broad range of ELISA kits covering over 6,000 different assay targets and two Cell Supernatant Exosome Isolation Kits. 

CUSABIO offers 60,000+ antibodies that are specific to a variety of species and can be used in multiple applications. Furthermore, the number of CUSABIO antibodies is continuing to grow at a rate of 1000 per year.

As an original manufacturer, CUSABIO designs, produces and validates every antibody in-house. Besides advanced experimental apparatus, CUSABIO antibody line also has a professional technical team, so CUSABIO has succeeded in setting up many technology platforms. At present CUSABIO antibodies could be applied in ELISA, WB, IHC/ICC, IF, IP/Co-IP, ChIP and FC. 

CUSABIO Protein Expression Platform has established four recombinant expression systems from prokaryotic (E.coli) to eukaryotic (Yeast, mammalian cell and insect baculovirus), and has also built unique in vitro E.coil expression system, which enables us to express transmembrane proteins that are usually quite difficult to express.

We currently have 70 native proteins, 100 small molecule antigens, 320 active proteins, 1000+ recombinant proteins in stock, 5700+ developed recombinant proteins, 10,000+ cDNA clones, 36,000+ transmembrane proteins, 500,000+ semi-customized recombinant proteins. 

Custom Service
Given the specificity of each experiment, CUSABIO provides latest and comprehensive custom services to meet customers’request, including phage display service, antibody service, protein service, gene synthesis service and oligo synthesis service. We are very pleased to assist our customers worldwide with all passions and great efforts. Today, CUSABIO is proud to be strong backup for clients.

Our Promise/ Mission

CUSABIO’s goal is to provide the highest quality ELISA kits, antibodies, proteins and services for reasonable costs allowing our customers to focus their precious time and resources on advancing their own research. Besides, CUSABIO aims to offer their customers with the critical reagents they need more rapidly and in a more cost-effective manner than can be done in their own labs. Here, we illuminate our promise from the following aspects.


Technical Support
CUSABIO technical team consists of scientists with Doctorate and Master Degrees.
Solve customer problems within 24 hours by email, phone, livechat.
More than 200 online technical resources.

Global Presence
More than 90 countries and 150 distributors all over the world.


Affordable Price
According to our mission, CUSABIO always keeps on improving production efficiency and controlling the cost under the premise in quality so that we can provide products and services for customers at affordable price.

100% Risk-free Performance Guarantee


Exosome Isolation Kits
ELISA Kits For Food Safety & Drug Residues

Active Proteins
Native Proteins
Recombinant Proteins
Transmembrane Proteins

Recombinant Antibodies
Monoclonal Antibodies
Polyclonal Antibodies
Secondary Antibodies
Tag/Control Antibodies
Small Molecular Antibodies
ChIP Antibodies
Antibody Pairs
Custom Antibodies
Modified Histone Antibodies

Stable Cell LineMolecular Biology Products
Tool Enzymes

Small Molecule
Food Safety Small Molecular Antigens
Other Small Molecular Antigens

Hot Categories
Immunohistochemistry (IHC) Antibodies
IS Series Cytokine Detection ELISA Kit
Recombinant DT3C protein
 Chemokine Receptors
G protein-Coupled Receptor
Cell Culture Meat Growth Factors
Recombinant Antibodies for Drug Discovery
Recombinant Proteins for ADCs
New Products Launch


Oligo Synthesis Service
Gene Synthesis Service
Protein Expression Services
Transmembrane Protein Expression Service
E.coli Expression System
Yeast Expression System
In vitro E.coli Expression System
Insect Baculovirus Expression System
Mammalian Cell Expression System

Stable Cell Line Development Service

Therapeutic Antibody Discovery Service
Phage Display Service
Custom Antibody Services
HTP Recombinant Antibody Production
Recombinant Ab Production
Monoclonal Ab Production
Polyclonal Ab Production
Modified Ab Production
Anti-idiotype Antibody Production
Custom Nanobody Service

Peptide Synthesis Service


Popular Pathways:

Hippo signaling pathway
Jak-STAT signaling pathway
MAPK signaling pathway
mTOR signaling pathway
Notch signaling pathway
PI3K-Akt signaling pathway
TGF-beta signaling pathway
Wnt signaling pathway

By Research Area:

Calcium signaling pathway
cAMP signaling pathway
Chemokine signaling pathway
ErbB signaling pathway
Estrogen signaling pathway
G protein coupled receptor signaling pathway
Hedgehog signaling pathway
HIF-1 signaling pathway
Hippo signaling pathway
Jak-STAT signaling pathway
MAPK signaling pathway
mTOR signaling pathway
Notch signaling pathway
p53 signaling pathway
PI3K-Akt signaling pathway
PPAR signaling pathway
Target Therapy
TGF-beta signaling pathway
VEGF signaling pathway
Wnt signaling pathway

Antigen processing and presentation
B cell receptor signaling pathway
Complement and coagulation cascades
Fc epsilon RI signaling pathway
Fc gamma R-mediated phagocytosis
Hematopoietic cell lineage
IL-17 signaling pathway
Inflammasome Signaling
Leukocyte transendothelial migration
Natural killer cell mediated cytotoxicity
NOD-like receptor signaling pathway
Osteoclast differentiation
T cell receptor signaling pathway
Th1 and Th2 cell differentiation
Th17 cell differentiation
Thyroid hormone synthesis
Toll-like receptor signaling pathway
Virus Infection

Cardiac muscle contraction
Focal adhesion
Gap junction
Lipids and Inflammation in Atherogenesis
NF-kappa B signaling pathway
Nitric oxide signaling
Regulation of actin cytoskeleton
Renin-angiotensin system
TNF signaling pathway
Vascular smooth muscle contraction

Ubiquitin mediated proteolysis

Cell Processing
Adherens junction
Cell cycle
Cell markers
Cellular senescence
MAPK Erk pathway
Protein processing in endoplasmic reticulum
Ras signaling pathway
Signaling pathways regulating pluripotency of stem cells

Adipocytokine signaling pathway
AGE-RAGE signaling pathway in diabetic complications
AMPK signaling
Apelin signaling pathway
Cell ageing and metabolism
cGMP-PKG signaling pathway
Cholesterol metabolism
ER Stress pathway
FoxO signaling pathway
Glucagon signaling pathway
Insulin signaling pathway
Myocardial Fatty Acid Metabolism
Oxidative Phosphorylation
Phosphatidylinositol signaling system
Phospholipase D signaling pathway
Rap1 signaling pathway
Sphingolipid signaling pathway

Excitatory synapse pathway
Glutamatergic synapse
Inflammatory Pain
Inhibitors of axonal regeneration
Neurotrophin signaling pathway
Secreted Extracellular Vesicles
Synaptic vesicle cycle