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What are the advantages and disadvantages of the BCA protein assay?
Advantages:
1. This method is widely adopted, easy and rapid to perform, and can complete the assay within 45 minutes—four times faster than the classic Lowery method and even more…
2. It is resistant to the effects of common concentrations of detergents, urea, and other substances, exhibiting strong anti-interference performance.
3. The coefficient of variation for detecting different protein molecules is also significantly lower than that of the Coomassie Brilliant Blue method.
4. Accurate, highly sensitive, and with excellent reagent stability. The BCA assay exhibits a strong linear relationship over a broad concentration range of 20–20 µg/mL, while its micro‑volume detection range is 0.5–10 µg/mL.
5. Economical and practical: in addition to test tubes, measurements can be performed directly in microplate wells, significantly reducing the amounts of sample and reagents required.
Disadvantages:
1. May be affected by chelating agents (EDTA, EGTA) and high-concentration reducing agents (DTT, β-mercaptoethanol);
2. The reaction requires incubation in a constant-temperature water bath for 30 minutes or longer.
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