R&D Systems® ELISAs are the most trusted, most published ELISAs on the market with a menu of 700 target analytes spanning 12 species. Our ELISAs perform as expected every time because of our high quality manufacturing and performance standards. Quantikine ELISA kits are ready to use. Quantikine QuicKits ELISA kits are ready to use kit that only takes 90 minutes to results with just one wash step. Quantikine HS ELISA kits Quantikine High Sensitivity ELISA Kits are complete assays generally used when very low levels of the target protein are expected. DuoSet Development Kits allow for more flexibility.