Competitive ELISA kits

Discover the precision of competitive ELISA Kits tailored for specific and sensitive target quantification.

Hormone detection ELISA kits

Competitive ELISA is ideal for hormone detection, enabling the precise quantification of small steroid molecules, such as cortisol and estradiol, that are too small for sandwich ELISA formats.

cAMP and cGMP ELISA kits

Competitive ELISAs are commonly used to quantify cyclic nucleotides, such as cAMP and cGMP, providing sensitive detection of these key intracellular signaling molecules.

His-tag ELISA kit

For rapid and specific quantification of His-tagged recombinant proteins in various sample types.

Competitive ELISA is a powerful technique used to quantify small molecules, hormones, and other analytes that are typically too small to be accommodated by two antibodies, making sandwich ELISA formats unsuitable. In a competitive ELISA, the target analyte in the sample competes with a labeled version or a coated antigen for binding to a specific antibody. The signal generated is inversely proportional to the concentration of the analyte, making this format ideal for detecting low-abundance targets such as steroids, drugs, and tags like His-Tag in recombinant proteins. Competitive ELISAs are widely used in endocrinology, toxicology, pharmacology, and food safety due to their sensitivity and versatility.

We offer a robust selection of competitive ELISA kits designed to meet the needs of researchers working with challenging targets. Their kits cover a broad spectrum of analytes, including hormones such as cortisol, estradiol, and testosterone, as well as small molecules and epitope tags such as His-Tags. Each kit is developed with high-affinity antibodies and optimized protocols to ensure reproducibility and accuracy across various sample types, including serum, plasma, and cell lysates. At Abcam, we are committed to quality and scientific support, making our competitive ELISA kits a trusted choice for applications ranging from biomarker quantification to drug screening and the analysis of recombinant proteins.