RayBio® Human CD28 ELISA Kit for Serum, Plasma, and Cell Culture Supernatants.
Lead time: Typically ships within 1-2 business days. No Friday shipments.
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Product Description
Specifications
| Size | 1 Plate Kit, 2 Plate Kit, 5 Plate Kit |
| Estimated Lead Time | 1-2 business days |
| Species | Human |
| Sensitivity | 0.1 ng/ml Need more sensitivity? Check out the new NexaTag® kit for this target. Still not enough? Then your answer is our Ultrasensitive Biomarker Testing Service powered by Simoa™ technology. |
| Detection Range | 0.1 ng/ml - 25 ng/ml |
| Specificity | This ELISA kit shows no cross-reactivity with the following cytokines tested: human B7-1 (CD80), B7-2 (CD86), B7-H1 (PD-L1), B7-H2 (ICOS L), B7-H3 (CD276), CTLA-4 (CD152), ICOS (CD278), PD-1 (CD279), PD-L2 (B7-DC). |
| Compatible Sample Types | Cell Culture Supernatants, Plasma, Serum |
| Recommended Dilution (Serum/Plasma) | 3 fold |
| Accession Number | P10747 |
| Gene Id | 940 |
| Gene Symbols | CD28 |
| Protein Name / Synonyms | T-cell-specific surface glycoprotein CD28 (TP44) (CD antigen CD28) |
| Quantitative/Semi-Quantitative | Quantitative |
| Solid Support | 96-well Microplate |
| Design Principle | Sandwich-based |
| Method Of Detection | Colorimetric |
| Research Area | Inflammation, Adaptive Immunity |
| Shipping Type | Blue ice |
| Storage | ≤-20°C |
Standard Curves
Spiking & Recovery Results
Linearity Results
Application Notes
Kit Components
- Pre-Coated 96-well Strip Microplate
- Wash Buffer
- Stop Solution
- Assay Diluent(s)
- Lyophilized Standard
- Biotinylated Detection Antibody
- Streptavidin-Conjugated HRP
- TMB One-Step Substrate
Other Materials Required
- Distilled or deionized water
- Precision pipettes to deliver 2 µl to 1 µl volumes
- Adjustable 1-25 µl pipettes for reagent preparation
- 100 µl and 1 liter graduated cylinders
- Tubes to prepare standard and sample dilutions
- Absorbent paper
- Microplate reader capable of measuring absorbance at 450nm
- Log-log graph paper or computer and software for ELISA data analysis
Protocol Outline
- Prepare all reagents, samples and standards as instructed in the manual.
- Add 100 µl of standard or sample to each well.
- Incubate 2.5 h at RT or O/N at 4°C.
- Add 100 µl of prepared biotin antibody to each well.
- Incubate 1 h at RT.
- Add 100 µl of prepared Streptavidin solution to each well.
- Incubate 45 min at RT.
- Add 100 µl of TMB One-Step Substrate Reagent to each well.
- Incubate 30 min at RT.
- Add 50 µl of Stop Solution to each well.
- Read at 450 nm immediately.
Storage/Stability
The entire kit may be stored at -20°C for up to 1 year from the date of shipment. Avoid repeated freeze-thaw cycles. The kit may be stored at 4°C for up to 6 months. For extended storage, it is recommended to store at -80°C.
