Assay kits are widely used in many research areas including life science research, drug discovery, environmental monitoring, etc. They have become an indispensable tool in experiments. The existence of assay kits allows the experimenter to get rid of the heavy reagent preparation and optimization process. Because of that, researchers get more time to do further study.

CUSABIO offers thousands of assay kits for researchers worldwide since 2007. These kits have most advantages of kits on the market, such as easy to use, time-efficient, wide application, etc. Moreover, CUSABIO provides 100% Risk-free Performance Guarantee so that the researchers don't need to worry about the product quality.



16 years ago, CUSABIO started supplying ELISA Kits for researchers worldwide. After so many years’ effort, CUSABIO has a sound platform for the development of ELISA kit, mature antigen-antibody research and development system. We are proficient in a variety of ELISA technologies, such as the double-antibody sandwich method, double antigen sandwich method, (direct) competition ELISA, indirect competition ELISA, blocking method, indirect ELISA and other methods. Combined with diagnostic kits development team, we are able to develop the kits with clinical diagnostic level, and make the quality in the leading place worldwide. CUSABIO now offers a broad range of ELISA kits covering over 4,000 different assay targets.

CUSABIO ELISA kits have the advantages that most ELISA kits have, such as no special handling required, simple operation, various species, etc. However, CUSABIO has done much more to provide better products and services to every research.

  • Strict quality control and performance evaluation

    Linearity ranges, LLD (Lower Limit of Detection), Precision, Recovery, Component and kit stability, Specificity, Natural sample detection, etc. Every detail is on our radar. Check the QC system here>>

  • High Sensitivity

    CUSABIO selects high-quality antibodies as the raw materials of ELISA kits, which ensure our kits have higher sensitivity generally. And we randomly compared CUSABIO ELISA kit sensitivity with different competitors' assay across 21 popular protein targets and calculated the ratios. CUSABIO ELISA shows superior sensitivity. Check the result here>>

  • Multiple Biological Samples

    CUSABIO ELISA kits are validated in multiple biological samples: serum, plasma, body fluids such as urine, cell culture supernatant and cell /tissue lysate.

  • Food safety& Drug Residues ELISA kits

    Food safety has become a global issue because it affects the health of everyone. CUSABIO also developed a series of ELISA kits for food safety& drug Residues such as Gentamicin (GEN), Kanamycin (KA), Aflatoxin, and so on.

  • Cited in more than 11,000 references

    After more than 13 years effort on developing good research tools for our customers, we are trusted by thousands of researchers all around the world. CUSABIO products are cited in more and more publications in well-known magazines such as Nature, PLOS One, JASN, Bio Factors, Society for Endocrinology, Scientific Reports, APS and so on. Click here to see more references>>

  • 100% Risk-free Performance Guarantee

    We provide a replacement product or refund if the product doesn't perform as promised in the manual. Read more>>

Exosome Isolation Kits

6 years ago, CUSABIO started developing exosome isolation kits. The most excellent scientists of CUSABIO join the research. After so many experiments and analysises, we finally develop the exosome isolation kits that we can be proud of. Even though we are not the first company to make exosome isolation kits, our exosome isolation kits have better performance than many ones on the market. Check more details of CUSABIO exosome isolation kits>>

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