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SARS-CoV-2 Spike Protein S1 RBD ELISA Kit

Uniprot : P0DTC2
  • Cat.No.:E-EL-E605

  • Reactivity: SARS-CoV-2

To Purchase E-EL-E605

Size:
  • 96T
  • 48T
Price: $550
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Product Details

Properties

Assay type Sandwich-ELISA
Format 96T
Assay time 3.5h
Detection range 0.39-25 ng/mL
Sensitivity 0.09 ng/mL
Sample type &Sample volume serum, plasma and other biological fluids; 100μL
Specificity This kit recognizes SARS-CoV-2 S1RBD in samples. No significant cross-reactivity or interference between SARS-CoV-2 S1RBD and analogues was observed.
Reproducibility Both intra-CV and inter-CV are < 10%.
Application This ELISA kit applies to the in vitro quantitative determination of SARS-CoV-2 S1RBD concentrations in serum, plasma and other biological fluids.

Test Principle

This ELISA kit uses the Sandwich-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to SARS-CoV-2 S1RBD(Capture Ab:E-AB-V1003; Detection Ab:E-AB-V1002; Antigen:PKSR030477;). Standards or samples are added to the micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for SARS-CoV-2 S1RBD and Avidin-Horseradish Peroxidase (HRP) conjugate are added successively to each micro plate well and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain SARS-CoV-2 S1RBD, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by the addition of stop solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of SARS-CoV-2 S1RBD. You can calculate the concentration of SARS-CoV-2 S1RBD in the samples by comparing the OD of the samples to the standard curve.

Kit components & Storage

An unopened kit can be stored at 2-8℃ for 1 month. If the kit is not supposed to be used within 1 month, store the components separately according to the following conditions once the kit is received.
ItemSpecificationsStorage
Micro ELISA Plate(Dismountable) 96T: 8 wells ×12 strips
48T: 8 wells ×6 strips
-20℃, 6 months
Reference Standard 96T: 2 vials
48T: 1 vial
Concentrated Biotinylated Detection Ab (100×) 96T: 1 vial, 120 μL
48T: 1 vial, 60 μL
Concentrated HRP Conjugate (100×) 96T: 1 vial, 120 μL
48T: 1 vial, 60 μL
-20℃(Protect from light), 6 months
Reference Standard & Sample Diluent 1 vial, 20 mL 2-8°C, 6 months
Biotinylated Detection Ab Diluent 1 vial, 14 mL
HRP Conjugate Diluent 1 vial, 14 mL
Concentrated Wash Buffer (25×) 1 vial, 30 mL
Substrate Reagent 1 vial, 10 mL 2-8℃(Protect from light)
Stop Solution 1 vial, 10 mL 2-8°C
Plate Sealer 5 pieces
Manual 1 copy
Certificate of Analysis 1 copy

Technical Data

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level SARS-CoV-2 S1RBD were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level SARS-CoV-2 S1RBD were tested on 3 different plates, 20 replicates in each plate.

  Intra-assay Precision Inter-assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean (ng/mL) 1.32 3.84 11.49 1.35 4.09 10.94
Standard deviation 0.09 0.22 0.45 0.09 0.18 0.53
CV (%) 6.82 5.73 3.92 6.67 4.40 4.84

Recovery

The recovery of SARS-CoV-2 S1RBD spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.

Sample Type Range (%) Average Recovery (%)
Serum(n=8) 88-100 94
EDTA plasma (n=8) 89-101 95

Linearity

Samples were spiked with high concentrations of SARS-CoV-2 S1RBD and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.

Target Information

Database LinksSwissProt: P0DTC2
SynonymsSpike protein S1, S1 subunit, Receptor binding domain, S1RBD, RBD domain

Assay Procedures

elisa assay procedure 1

1. Add 100μL standard or sample to the wells. Incubate for 90 min at 37°C

elisa assay procedure 2

2. Discard the liquid, immediately add 100μL Biotinylated Detection Ab working solution to each well. Incubate for 60 min at 37°C

elisa assay procedure 3

3. Aspirate and wash the plate for 3 times

elisa assay procedure 4

4. Add 100μL HRP conjugate working solution. Incubate for 30 min at 37°C. Aspirate and wash the plate for 5 times

elisa assay procedure 5

5. Add 90μL Substrate Reagent. Incubate for 15 min at 37°C

elisa assay procedure 6

6. Add 50μL Stop Solution

elisa assay procedure 7

7. Read the plate at 450nm immediately. Calculation of the results

Related Products

Elabscience® provides ancillary reagents required for ELISA kit developments.11 reagents in total, including reagents for coating, blocking, washing, improving the stability and reducing matrix interference etc.
Cat.No. Product Name Specifications
E-ELIR-001 ELISA Plate Coating Buffer(1×) 100mL, 1000mL
E-ELIR-002 ELISA Plate Coating Buffer(5×) 100mL, 1000mL
E-ELIR-003 ELISA Plate Blocking Buffer 100mL, 1000mL
E-ELIR-004 Wash Buffer for Sandwich-ELISA(25×) 100mL, 1000mL
E-ELIR-005 Wash Buffer for Competitive-ELISA(25×) 100mL, 1000mL
E-ELIR-006 Stop Solution 100mL, 1000mL
E-ELIR-007 HRP-conjugate Stabilizer 10mL, 100mL, 500mL
E-ELIR-008 HRP-conjugate Diluent 100mL, 1000mL
E-ELIR-009 Biotinylated Antibody Stabilizer 10mL, 100mL, 500mL
E-ELIR-0010 Biotinylated Antibody Diluent 10mL, 100mL, 500mL
E-ELIR-0011 Sample Diluent 10mL, 100mL, 500mL

Citations

From now on, if you have published a paper by using any of our products since 1/1/2019, fill out the “Elabscience Publication Reward Application Form”carefully and send it to orders@elabscience.com, we will get back to you with the reward after we confirm it ASAP!

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