Human CK-18(Cytokeratin 18) ELISA Kit

What it means: Target is the analyte this ELISA is designed to measure. The target on this page is CK-18 (Cytokeratin 18).

Most ELISA targets are proteins (often gene products) used as biomarkers for pathway activity, disease models, or treatment response.

Why it matters:

• Correct match: Use the target name/synonym (Cytokeratin 18) to confirm you’re measuring the right biomarker (isoforms and closely related family members can differ).
• Species fit: This kit is listed as Human reactivity—choose a kit matched to your organism to avoid reduced binding and inaccurate quantification.
• Interpretation: Baseline abundance varies widely by tissue, treatment, and disease state—plan controls and a dilution series to keep readings within the standard curve.

How to interpret here: The chip value shows the target as CK-18 (Cytokeratin 18). Use it to align your study design (samples, expected range, and controls) and follow the recommended standard curve and dilution guidance.

What it means: Reactivity indicates the species the antibodies/standards in the kit are validated to detect. This kit is listed as Human.

Why it matters:

• Accuracy: Species-matched reagents improve binding and reduce under-recovery caused by sequence differences.
• Sample choice: Use matrices typical for that species (e.g., serum/plasma, tissue lysate) and validate dilution to minimize matrix interference.
• Comparability: Don’t compare absolute concentrations across species unless you’ve validated equivalence with appropriate standards and controls.

How to interpret here: Choose Human when your samples come from that organism. For cross-species studies, validate each species separately to ensure comparable recovery.

What it means: A Sandwich ELISA captures the target with one antibody and detects it with a second antibody, improving specificity and sensitivity for many protein targets.

Why it matters:

• Higher specificity: Dual-antibody recognition helps reduce background from related proteins in complex samples.
• Best for proteins: Commonly used for cytokines, receptors, enzymes, and other larger analytes with multiple epitopes.
• Workflow impact: Signal typically increases with analyte concentration; follow incubation and wash steps closely to maintain signal-to-noise.

How to interpret here: The chip value Sandwich indicates a dual-antibody format—use appropriate sample dilution and thorough washing for reliable quantification.

What it means: Sensitivity is the lowest concentration the assay can reliably distinguish from background under the recommended conditions. The listed sensitivity is 0.056 ng/mL.

Why it matters:

• Low-abundance targets: Higher sensitivity (a lower number) helps when expected levels are near the detection limit.
• Plan dilutions: If samples are concentrated, dilute into the assay range; if levels are very low, optimize sample prep to improve recovery.
• Matrix matters: Real samples can reduce effective sensitivity—use matrix-matched standards or include spiking/recovery checks when possible.

How to interpret here: Use 0.056 ng/mL to judge whether the kit can detect your expected baseline levels. If you expect concentrations close to this value, run a pilot with a dilution series to confirm reliable quantification.