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Human Novel Coronavirus Nucleoprotein IgG antibody (2019-nCoV-Ab-IgG) ELISA Kit


Species Reactivity

Human (Homo sapiens)

UniProt

N/A

Abbreviation

2019-nCoV-Ab-IgG

Alternative Names

SARS-CoV-2 Nucleocapsid Protein; SARS-CoV-2 NP; nucleocapsid protein [Severe acute respiratory syndrome coronavirus 2]; novel coronavirus N Protein; novel coronavirus Nucleocapsid Protein; 2019-nCoV Nucleoprotein; 2019-nCoV N; 2019nCoV N; 2019-nCoV N Protein; 2019 ncov N Protein; 2019-nCoV nucleocapsid protein

Range

Qualitative detection antibody

Sensitivity

Request Information

Sample Type

Serum

Detection Method

Indirect method

Analysis Method

Qualitative

Assay Duration

1-3h

Sample Volume

1-200 μL

Detection Wavelengt

450 nm

Cat

AE64577HU

Size

96T 48T

Price

Inquire

Availability

3-5 working days

Manual

Inquire
Test principle:
The microtiter plate provided in this kit has been pre-coated with 2019-nCoV (N) protein. Samples are then added to the appropriate microtiter plate wells with a Horseradish Peroxidase (HRP)-conjugated anti-human IgG antibody and incubated. Then substrate solutions are added to each well. Only those wells that contain 2019-nCoV-Ab-IgG and enzyme-conjugated anti-human IgG antibody will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. 

Product Overview:
Coronaviruses are enveloped viruses with a positive-sense RNA genome and with a nucleocapsid of helical symmetry. Coronavirus nucleoproteins localize to the cytoplasm and the nucleolus, a subnuclear structure, in both virus-infected primary cells and in cells transfected with plasmids that express N protein. Coronavirus N protein is required for coronavirus RNA synthesis, and has RNA chaperone activity that may be involved in template switch. Nucleocapsid protein is a most abundant protein of coronavirus. During virion assembly, N protein binds to viral RNA and leads to formation of the helical nucleocapsid. Nucleocapsid protein is a highly immunogenic phosphoprotein also implicated in viral genome replication and in modulating cell signaling pathways. Because of the conservation of N protein sequence and its strong immunogenicity, the N protein of coronavirus is chosen as a diagnostic tool. 

Components:

Reagents

Quantity

Reagents

Quantity

Assay plate (96 Wells)

1

Instruction manual

1

Standard (lyophilized)

2

Sample Diluent

1 x 20 mL

Biotin-Conjugate (concentrate 100 x)

1 x 120 μL

Biotin-Conjugate Diluent

1 x 20 mL

Streptavidin-HRP  (concentrate 100 x)

1 x 120 μL

Streptavidin-HRP Diluent   

1 x 20 mL

Wash Buffer (concentrate 25 x)

1 x 20 mL

Substrate Solution

1 x 12 mL

Stop Solution

1 x 10 mL

Adhesive Films

4

Specificity:
This assay has high sensitivity and excellent specificity for detection of Human 2019-nCoV-Ab-IgG. No significant cross-reactivity or interference between Human 2019-nCoV-Ab-IgG and analogues was observed.
Recovery:

Sample Type

Number

Recovery range (%)

Average(%)

Serum

10

90-101

96

EDTA plasma

10

89-97

93

Heparin plasma

10

91-99

95

Precision:
Intra-assay Precision (Precision within an assay) Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision. Inter-assay Precision (Precision between assays) Three samples of known concentration were tested in forty separate assays to assess inter-assay precision. CV (%) = SD/meanX100 Intra-Assay: CV<8% Inter-Assay: CV<12%

Linearity:
The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human 2019-nCoV-Ab-IgG and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.

Sample Type

1:2

1:4

1:8

1:16

Serum

78-89%

81-99%

92-103%

95-105%

EDTA plasma

91-101%

90-98%

93-101%

91-98%

Heparin plasma

92-103%

93-102%

92-99%

91-101%

Stability:
The stability of ELISA kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition. The loss rate was determined by accelerated thermal degradation test. Keep the kit at 37°C for 4 and 7 days, and compare O.D.values of the kit kept at 37°C with that of at recommended temperature. (referring from China Biological Products Standard, which was calculated by the Arrhenius equation. For ELISA kit, 4 days storage at 37°C can be considered as 6 months at 2 - 8°C, which means 7 days at 37°C equaling 12 months at 2 - 8°C).

Sample collection and storage:
Serum: Use a serum separator tube (SST) and allow samples to clot for two hours at room temperature or overnight at 2 - 8°C before centrifugation for 15 minutes at 1000 × g. Remove serum and assay immediately or aliquot and store samples at ≤ -20°C. Avoid repeated freeze-thaw cycles. 

Kits storage instructions:
Store at 2-8°C. Please refer to Instruction Manual.