COVID-19 Mutant Proteins

Recombinant SARS-CoV-2 Spike Protein Variants

At BIOZOL, we provide you with recombinant SARS-CoV-2 spike-proteins containing the latest identified mutations, reason for the increased transmissibility of the U.K. and Brazil variant. 

Sequence and structure of the COVID-19 pathogen SARS-CoV-2 are well studied and described. Of particular interest with respect to diagnostics and drug development is the spike protein (S-protein) due to its role in the interaction with human host receptors. Since the beginning of the circulation of SARS-CoV-2 in humans, the viruses acquired an increasing number of polymorphic nucleotide positions. The influence of these mutations on properties like transmissibility, virulence or immunogenicity is object of intensive investigation. 

Viral variants harboring the D614G spike mutation were rare at the onset of the pandemic but are now prevalent worldwide, attributed to increased transmissibility (Korber et al.). Three fast-spreading new variants have emerged in the recent months: the U.K. variant (Alpha variant) B.1.1.7 (Rambaud et al.), the Brazil variant B.1.1.28 P.1 (Gamma variant), and the South Africa variant (Beta variant) B.1.351 (Tegally et al.).

A subset of the mutations identified in the RBD domain of the spike protein occurs in more than one strain, although those variants are believed to be independently evolved. These convergent mutations, specifically, the N501Y (shared between B.1.1.7, B.1.351 and P.1) and E484K (shared between B.1.351, P.1, and the Sweden-1 variant), are of high interest because they may be the cause of the increased transmissibility (Zahradnik et al.). Furthermore, the K417N and E484K polymorphisms reduce sensitivity to neutralizing antibodies (Greaney et al.), which may indicate reduced efficacy of the immune response after infection and vaccination, respectively.

Fig: 3D structure of Spike trimer embedded in lipid bilayer. 
Mutants are shown green and labelled accordingly. (Source: The Native Antigen)


To help you study and track the newly occuring variants of SARS-CoV-2, our suppliers make efforts to provide you with recombinant spike proteins of the various mutants the fastest possible. Several mutant proteins are already available from our partners Signalchem, Sino Biologicals and The Native Antigen.


Selected SARS-CoV-2 Mutant Recombinant Spike Proteins:


Mutation(s) Art.-Nr. Product


(European Variant, B1)

SCM-C19S1-G231H Signalchem SARS-CoV-2 Spike Protein S1 (D614G)

Sino Biological SARS-CoV-2 S1 Spike Protein (D614G)-His, HPLC-verified

del69-70, del144, N501Y, A570D,

D614G, P681H,T716I, S982A, D1118H

(Alpha Variant, B.1.1.7)


SARS-CoV-2 (COVID-19) Spike (del69-70,del144,N501Y,A570D,D614G,...) (ECD) Protein, His tag (active), Unconjugated

NAC-REC31924-100 SARS-CoV-2 (B.1.1.7) Stabilized Spike Glycoprotein, His-Strep-Tag (HEK293)

K417N, E484K, N501Y

(Beta Variant, B.1.351)

GTX136095-PRO SARS-CoV-2 (COVID-19) Spike S1 (L18F, D80A,..., R246I, K417N, E484K, N501Y, D614G), His tag (active), Unconjugated
GTX136022-PRO SARS-CoV-2 (COVID-19) Spike RBD (K417N, E484K, N501Y Mutant) protein, His tag (active), Unconjugated
NAC-REC31963-100 SARS-CoV-2 (B.1.351) Stabilized Spike Glycoprotein (Trimeric), His-Strep-Tag (HEK293)
BIV-P1645-50 BioVision Human CellExp(TM) SARS-CoV-2 Spike RBD (K417N, E484K, N501Y)
ELA-PKSV030319 Recombinant SARS-CoV-2 Spike RBD(K417N,E484K,N501Y)(His Tag)

L18F, T20N, P26S, D138Y, R190S, K417T,

E484K, N501Y, D614G, H655Y, T1027I, V1176F

(Gamma Variant, B.1.1.28 P1)

NAC-REC31944-100 SARS-CoV-2 (B.1.1.28)Stabilized Spike Glycoprotein (Full-Length), His-Strep-Tag (HEK293)

L452R, T478K

(Delta Variant, B.1.617.2)


SARS-CoV-2 (COVID-19) Spike RBD (L452R, T478K Mutant) protein, His tag, Unconjugated

E484Q, L452R

(Kappa Variant, B.1.617.1)


SARS-CoV-2 (B.1.617.1: E484Q, L452R) Spike Glycoprotein (S1) RBD, His-Tag (HEK293)

GTX136299-PRO SARS-CoV-2 (COVID-19) Spike RBD (L452R, E484Q Mutant) protein, His tag (active), Unconjugated


(B.1.1.7, B.1.351 and P.1)


SARS-CoV-2 (2019-nCoV) Spike RBD(N501Y)-His Recombinant Protein

D614G, E484K



SARS-CoV-2 (D614G, E484K Mutant) Spike Glycoprotein (S1), Sheep Fc-Tag (HEK293)

D614G, S477N



SARS-CoV-2 (D614G, S477N Mutant) Spike Glycoprotein (S1), Sheep Fc-Tag (HEK293)

D614G, L84I, N439K



SARS-CoV-2 (D614G, L84I, N439K Mutant) Spike Glycoprotein (S1), Sheep Fc-Tag (HEK293)

D614G, G485R



SARS-CoV-2 (D614G, G485R Mutant) Spike Glycoprotein (S1), Sheep Fc-Tag (HEK293)

D614G, V445I, H655Y, E583D



SARS-CoV-2 (D614G, V445I, H655Y, E583D Mutant) Spike Glycoprotein (S1), Sheep Fc-Tag (HEK293)




SARS-CoV-2 Spike RBD(Y453F)-His Recombinant Protein


(B.1.258, B.1.141 / B1.258)


SARS-CoV-2 (2019-nCoV) Spike RBD(N439K)-His Recombinant Protein


From System Biosciences, Lentivector Packaging Mixes are available, pseudotyped with the SARS-CoV-2 S1 spike protein in several variants, including the Southafrican variant B.1.351 (K417N, E484K, N501Y, and D614G).

Further SARS-CoV-2 mutant spike proteins are in development at several of our suppliers and will soon be available. If you are looking for a specific mutation, which is not yet available in our web store, please feel free to contact us and we will do our best to find the right protein for you.




Other News

Webinars from Vector Laboratories, Active Motif, and Genetex

Upcoming webinars in...

Cancer Research, IHC, ChIP-seq

DGK Kinases from SignalChem

DGK Kinases

Active DAGK Enzymes


AAV Reference Materi...

Vigene Bioscience - Quality Control for your AAV based Gene Delivery

Anti-Phospho Antibodies

Anti-Phospho Antibod...

Detection of phosphorylated proteins


ScyTek - Special Sta...

Histology special staining solutions and kits