General information
GeneCopoeia’s OmicsArray™ antigen microarray products and services include premade antigen microarrays, mocroarray processing kits, and antigen microarray custom services. Antigen microarrays are similar to protein microarrays (also known as “protein arrays” or “protein chips”) that comprise powerful tools for many applications, including autoantibody detection, biomarker profiling, virus identification, and more. Antigen microarrays enable parallel detection of antibodies or other biomarkers present in multiple patient samples for diseases including:
-Systemic lupus erythematosus
-Rheumatoid arthritis
-Sjögren’s Syndrome
-Type 1 diabetes
-Allergies
-Viral infections such as COVID-19
-Autoimmunity resulting from immune checkpoint inhibition therapy
-Central nervous system disorders such as Alzheimer’s disease
For detailed product information and ordering, visit our antigen microarray products and services page.
FAQ
Frequently Asked Questions
Answer: You can send us virtually any biological sample, including whole blood, serum, plasma, interstitial fluid, semen, urine, and saliva. To learn more, please contact us at inquiry@genecopoeia.com.
Answer: Yes.
Answer: Yes.
Answer: Yes.
Answer: Each nitrocellulose membrane is surrounded by a gasket to prevent leakage and cross-contamination.
Answer: a. Each slide carries 16 identical arrays. One of these is reserved for a PBS control, while the remaining 15 are used for incubation of each sample. Therefore, the total number of samples sent by the customer is preferably a multiple of 15. However, if you have fewer than 15 samples, we will need to charge you for the full cost of an entire slide of 15 samples. b. Theoretically, each of the different test groups requires a minimum of 3 samples to meet statistical reproducibility requirements. On this basis, the greater the number of samples, the higher the reproducibility of the results in the test group. In order to ensure the reliability of the results, the sample size of different test groups is recommended to be ≥30.
Answer: The antigen microarray uses fluorescence detection, and its sensitivity is higher and more stable than ELISA (colorimetry) and Western (chemiluminescence). The technical repetition correlation coefficient R2 between the arrays can reach 0.9 or more. The dynamic detection range is 1-65000. The larger the dynamic range, the more layers of signals that can be detected.
Answer: Please fully communicate with our Technical Support staff before the experiment to explain the purpose of the experiment and the sample status, to determine whether we can meet your needs and determine the experimental plan.
Answer: The antigens on the antigen array are all derived from self-antigens reported in the literature. For each of the different types of antigenic arrays, we have shown 20 related antigens. After you have signed the appropriate service agreement, we will provide you with all the antigens and related information before you publish your own antigen array test results. Please do not disclose this information to third parties.
Answer: Proteins are usually expressed and purified from E. coli or mammalian cells.
Answer: We usually spot the entire full-length protein in its native conformation. However, we can also spot truncated proteins or peptides if needed.
Answer: If you need a custom antigen microarray, we need to fully communicate with you about the following issues: a. The intellectual property of the antigen (whether from a published paper or a patent, etc.). We can only provide customized detection of antigens that do not involve patent protection; b. Basic information about the antigen (whether it is whole protein or peptide, molecular weight, domain, whether it is a membrane protein, etc.); c. Whether you can provide an antigen that meets the requirements of a custom array; d. If we need to provide the antigen to be tested, the corresponding cost and experimental time frame need to be accounted for separately.
Answer: The antigens on our predesigned arrays are usually human. However, for custom arrays, we can use antigens from virtually any organism.
Answer: Antigens are usually spotted at a concentration between 0.1 and 1.0 mg/ml, but each individual protein concentration requires optimization.
Answer: a. This difference may be related to the detection method. The protein used on the array is a non-denatured protein, which is different from western blot. The hybrid system of the chip is an antigen-trapping antibody, and the western blot antigen is slightly different from the antibody after being transfected with the antigen. Therefore, it may cause some differences; b. Please provide a graph of the results of western blot verification, so that we can better analyze the image and data of your verified indicators on the array.
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Publications
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