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Abstract
Gas6 protein is possibly involved in human diseases, but a validated plasma assay is lacking. So, we developed a sandwich enzyme‐linked immunosorbent assay (ELISA) method using commercially available reagents. An appropriate plasma‐based matrix was prepared to optimize the assay. The ELISA method showed inter‐ and intra‐assay coefficients of variation lower than 15%. Recoveries all fell within 15% of expected values. Plasma Gas6 concentration in 61 healthy donors was 20.3±3.8 ng/mL. Our assay meets FDA requirements for precision and accuracy for the validation of bioanalytical methods and it is suitable for research or diagnostic purposes.