Human CellExp™ SARS-CoV-2 S1 Protein (Delta Plus), Recombinant

A key protein in allowing viral entry into host cells
Catalog #: P1677 | abID:

Product Details

Alternate Name Delta variant S1 Protein, Spike glycoprotein subunit 1, Lineage B.1.617.2, SARS-CoV-2 S1 Protein
Gene ID 43740568
Accession # P0DTC2
Source HEK 293 cells
Appearance Lyophilized protein
Molecular Weight ~120 kDa (8xHis tag at the C-terminus)
Purity by SDS-PAGE > 95%
Formulation Lyophilized from 0.22 µm filtered PBS (pH 7.4) with 5% trehalose
Reconstitution Instructions Centrifuge the vial prior to opening. Reconstitute in sterile PBS (pH 7.4). Do not vortex.
Amino Acid Sequence Val 16 to Arg 683 (with substitutions at positions T19R, G142D, R158G, K417N, L452R, T478K, D614G and P681R, and deletions of E156 and F157)
Handling Centrifuge the vial prior to opening.
Storage Conditions -20ºC
Shipping Conditions Gel Pack
USAGE For Research Use Only! Not For Use in Humans.


SARS-CoV-2, the causative virus of COVID-19, uses the viral Spike (S) protein for host cell attachment and entry. The virus uses multiple factors including the human protease Furin, Angiotensin converting enzyme 2 (ACE2), Neuropilin-1 (NRP1) and the transmembrane protease serine 2 (TMPRSS2) for receptor interactions. The S protein has two domains S1 and S2, where S1 facilitates initial binding to the receptor and the S2 domain drives the membrane fusion and eventual entry of the virus. The S glycoprotein serves as an important target for monoclonal antibodies, entry inhibitors, and vaccines. Within the S1 protein, the conserved receptor-binding domain (RBD) binds with a high affinity for ACE2. Of the new emerging strains, SARS-CoV-2 Delta variant (lineage B.1.617.2) has become the dominant strain spreading globally. According to CDC, the Delta variant is more infectious and spreads faster than earlier forms of the virus. The Delta variant S1 domain harbors mutations including (but not limited to): T19R, G142D, E156-, F157-, R158G, K417N, L452R, T478K, D614G and P681R. Out of the several mutations found in the Delta variant, the four spike protein amino acid substitutions (L452R, T478K, D614G, P681R) are of most concern and thought to be the main attributes to the variant’s increased infectivity. Additionally, the Delta variant with the K417N spike mutation has been named “Delta Plus” or "Nepal variant." This K417N mutation is also present in the Beta variant.

Why buy BioVision Products?
Global Presence
Technical Support
BioVision aims to provide our customers innovative tools for accelerating drug discovery and biological research. BioVision offers >8,000 products including the most comprehensive array of assay kits for key targets in Metabolic pathways.
BioVision is committed to providing the highest quality products at a competitive price.
We have a broad network of global distributors who are ready to address your research needs and ensure fast delivery.
Our highly trained Technical Support team provides comprehensive product support and is dedicated to resolving your issues quickly and efficiently.