Recombinant MERS-CoV Nucleocapsid His-tag Protein, CF

Sf21 Insect Cell Expressed, Over 95% Purity
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Recombinant MERS-CoV Nucleocapsid His-tag Protein SDS-PAGE
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Product Details

Recombinant MERS-CoV Nucleocapsid His-tag Protein, CF Summary

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Product Specifications

>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Bioassay data are not available.
Spodoptera frugiperda, Sf 21 (baculovirus)-derived mers-cov Nucleocapsid protein
Met1-Thr411, with a C-terminal 6-His tag
Accession #
N-terminal Sequence
Sequence has been confirmed by mass spectrometry
Predicted Molecular Mass
46 kDa
49-55 kDa, under reducing conditions

Product Datasheets

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Data Image

SDS-PAGE Recombinant MERS-CoV Nucleocapsid His-tag Protein SDS-PAGE View Larger

2 μg/lane of Recombinant MERS-CoV Nucleocapsid His-tag Protein (10521-CV) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 49-55 kDa.

Reconstitution Calculator

Reconstitution Calculator

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Background: Nucleocapsid

MERS-CoV, which causes the Middles East Respiratory Syndrome (MERS), belongs to a family of viruses known as coronaviruses that are commonly comprised of four structural proteins: Spike protein (S), Envelope protein (E), Membrane protein (M), and Nucleocapsid protein (N) (1). While the S, E and M proteins build up the viral envelope, the N protein is involved transcription, replication and packaging of the viral RNA genome into a helical ribonucleocapsid (RNP) (1, 2). The MERS-CoV N protein is a ~45 kDa protein composed of two independent structural domains connected by a linker region. The N-terminal region contains an Intrinsically Disordered Region (3) and an RNA binding domain (4), the linker region interacts with the M protein and the C-terminal region contains a self-association domain (1, 2). The MERS-CoV N protein shares 46.3% and 4.5% amino acid sequence identity with SARS-CoV-1 and SARS-CoV-2 N protein, respectively. MERS-CoV N proteins have been shown to inhibit Type I Interferon(IFN) production(1). In addition, the N protein is an abundant protein during coronavirus infection and displays high immunogenic activity, making it a promising therapeutic target (5-7).

  1. Li, Y. et al. (2019) Engineering. 5:940.
  2. Hurst, K. R. et al. (2009) J. Virol. 83:7221.
  3. Wang, Y. et al. (2015) Acta. Crystallogr. F. Struct. Biol. Commun. 71:977.
  4. Papageorgiou, N. et al. (2016) Acta. Crystallogr. D. Struct. Biol. 72:192.
  5. Che, X. Y. et al. (2004) J. Clin. Microbiol. 42:2629.
  6. Guan, M. et al. (2004) Clin. Diagn. Lab. Immunol. 11:287.
  7. Chang, C-K. et al.(2016) Drug Discov. Today. 21:562.
Long Name
Nucleocapsid Protein
Entrez Gene IDs
918763 (HCoV-229E); 3200423 (HCoV-HKU1); 2943504 (HCoV-NL63); 39105221 (HCoV-OC43); 1489678 (SARS-CoV); 43740575 (SARS-CoV-2)
Alternate Names
N Protein; Nucleocapsid


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