SARS CoV-2 N protein

Name. Nucleocapsid protein, N protein, NP protein SARS-CoV-2 (COVID-19)
Specification. Recombinant N protein was purified from E.coli cells. It contains AA 1-419 fused to poly-his tag
Purity. >95% by SDS-PAGE under reducing and non reducing conditions. The protein migrates as 48-50 kDa
Special features. N protein in ELISA reacted with most of SARS-CoV-2 (COVID-19) patient sera and did not react with normal patient sera
Our SARS-CoV-2 N protein is already used in the manufacture of IVD ELISA kits
Formulation. Lyophilized powder or white tablet
Storage. N protein should be stored at lyophilized state at -20°C or lower
Application. ELISA, WB

Packing and cost

Packing, mgCost, $
1 mg300 $
100 mg2500 $
1000 mg150 000 $

Purity >95%

SARS-CoV-2 NP protein was separated on a 12.5% PAGE gel under reducing (R) and non reducing (nR) conditions. The gel was stained with “Instant Blue coomassie protein stain” with sensitivity - 5ng per band. The amount of loaded protein were 2 and 40 μg
SARS-CoV-2 NP protein was separated on a 12.5% PAGE gel under reducing (R) and non reducing (nR) conditions. 


The gel was stained with “Instant Blue coomassie protein stain” with sensitivity - 5ng per band.


The amount of loaded protein were 2 and 40 μg

Our SARS - CoV-2 NP is already used in IVD ELISA kits

Antigen: SARS-CoV2 Nucleocapsid Protein. Antigen Coating: 1 ug/ml, 50 mM carbonate, pH 9,6. Samples: Negative Human Serum, N = 1000 (pool 2016), Positive Human Serum N = 2000. Diagnostic Specificity 99+%; Diagnostic Sensitivity 99+%
Antigen: SARS-CoV2 Nucleocapsid Protein. 

Antigen Coating: 1 ug/ml, 50 mM carbonate, pH 9,6. 

Samples: Negative Human Serum, N = 1000 (pool 2016), Positive Human Serum N = 2000. 

Diagnostic Specificity 99+%; Diagnostic  Sensitivity 99+%

Sequence and structure

The sequence of Nucleocapsid protein (NP), N protein, SARS-CoV-2 (COVID-19):
The sequence of Nucleocapsid protein (NP), N protein, SARS-CoV-2 (COVID-19):
SARS-CoV-2 nucleocapsid protein structure prediction by C-I-TASSER
SARS-CoV-2 nucleocapsid protein structure prediction by C-I-TASSER

Shipping & Payment

  • Safe and convenient transportation. We work with DHL (own business account) and use the cold chain to deliver our products. The products are delivered in transport containers under temperature of minus -20 C. When a large amount of products is shipped, the container is equipped with a temperature data logger for monitoring temperature stability during transportation
  • Flexible payment conditions. Depending on the order, we allow Line of Credit Payment, except shipping costs that should be paid at time of order
  • Stable supply. We provide an individual delivery schedule of supply with guaranteed stable quantity on time
  • Special features. N protein in ELISA reacted with most of SARS-CoV-2 (COVID-19) patient sera and did not react with normal patient sera. Our SARS-CoV-2 N protein is already used in the production of IVD ELISA kits
  • Short terms. Estimated production time (delivery time is specified depending on the region): 1-1000 mg – 1 week, 1-10 g – 2 weeks, 10 -100 g – 3 weeks

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