Alpaca Anti-Spike S1 (Sb23)

Recombinant Alpaca monoclonal antibody against S1 subunit of SARS-CoV-2 Spike protein. PtX™ Alpaca Anti-S1 (Sb23) is produced in Nicotiana benthamiana plants and fused to VHH-Fc for use in Western blot and ELISA.

100 µg     |     Catalogue Number: CBT_A0005

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The Spike Protein is the characteristic surface antigen of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). Human coronaviruses are positive-stranded RNA viruses with large RNA genomes. Infection results in upper respiratory tract symptoms, similar to the common cold. The SARS-CoV-2 Spike glycoprotein is responsible for host cell membrane fusion and entry and serves as a target for the development of antibodies, entry inhibitors and vaccines. Our plant-made recombinant monoclonal antibody is fused to an Alpaca backbone and binds the SARS-CoV-2 Spike (S1) glycoprotein with high specificity. It is suitable for use in ELISA and Western blot.

Additional information

Available Unit Size

0.1mg, 1mg, 10mg, 100mg, 200mg

Key Benefits

This product is a plant-made, recombinant monoclonal antibody which offers several benefits including:

  • No animals or animal products are used in its development.
  • Proteins are fused at the genetic level for increased reproducibility of results.
  • BSA and Azide free.

For more information on plant-made, recombinant monoclonal antibodies click here.


Product Name PtX™ Alpaca Anti-SARS-CoV-2 Spike Protein S1 (Sb23)
Catalogue Number CBT_A0005
Expression Host Nicotiana benthamiana plants
Clonality Monoclonal, recombinant.
Species and Isotype Alpaca variable regions fused to alpaca IgG2b Fc region.
Tag Alpaca IgG2b Fc
Reporter Protein None
Description This product is a recombinant Alpaca antibody targeted to the SARS-CoV-2 S1 region of the Spike protein. It was produced in Nicotiana benthamiana plants via Agrobacterium tumefaciens mediated infiltration.
Target name SARS-CoV-2 S1 region of the Spike Protein.
Target sequence N/A
Verified Applications Western blot
Concentration 1.0 mg/ml
Form Liquid
Colour Clear to light yellow brown
Preparation Ready to use
Storage Short term (up to one week): 2 – 8 °C
Long term: Aliquot and store at – 20 °C
Store immediately. Aliquot and avoid multiple freeze thaw cycles.
Storage buffer 0.1  M Phosphate Buffered Saline, pH 7.4
Preservative: None
Purification notes This product was purified using Protein A affinity chromatography.
Purity ≥ 85 % as determined by SDS-PAGE
General notes If for any reason the product does not perform as specified, please contact our scientific support team for assistance by emailing

PtX™ | Plant-Based Expression

The biotechnology behind the development and manufacture of this product, transient plant-based expression, effectively turns Nicotiana benthamiana plants into single use, biodegradable bioreactors. Infiltrating this plant species with Agrobacterium tumefaciens cells, transformed with our proprietary plant expression vectors, allows rapid production of a wide variety of recombinant proteins. Plants are harvested and proteins extracted by various stages of filtration, clarification, purification, and polishing – resulting in a highly functional final product.

Visit our Technology page to learn more.


  • For Research Use Only.
  • Not for diagnostic or therapeutic use.
  • Not for resale without express authorization.
  • Trademark.

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