Description: A competitive ELISA for quantitative measurement of Human True insulin in samples from blood, plasma, serum, cell culture supernatant and other biological fluids. This is a high quality ELISA kit developped for optimal performance with samples from the particular species.

Description: A competitive ELISA for quantitative measurement of Human True insulin in samples from blood, plasma, serum, cell culture supernatant and other biological fluids. This is a high quality ELISA kit developped for optimal performance with samples from the particular species.

Description: A competitive ELISA for quantitative measurement of Human True insulin in samples from blood, plasma, serum, cell culture supernatant and other biological fluids. This is a high quality ELISA kit developped for optimal performance with samples from the particular species.

Description: ELISA

Description: HIV Chimeric Recombinant protein containing C-terminal of gp120 and most of gp41, expressed in E. coli. MW 27.3 kDa, 1.00 mg/mL.

Description: Recombinant SARS-CoV Spike protein containing 12-53, 90-115, 171-203 amino acids immunodominant regions was expressed in E. coli and purified by proprietary chromatographic technique.

Description: Recombinant SARS-CoV Spike protein containing 1051-1076, 1121-1154, 1162-1190 amino acids immunodominant regions was expressed in E. coli and purified by proprietary chromatographic technique.

Description: The spike protein (S) of coronavirus (CoV) attaches the virus to its cellular receptor, angiotensin-converting enzyme 2 (ACE2). A defined receptor-binding domain (RBD) on S mediates this interaction. The S protein plays key parts in the induction of neutralizing-antibody and T-cell responses, as well as protective immunity.

Description: 2019 nCoV/COVID19 Spike protein S Recombinant (S1+S2), His-tag

Description: 2019 nCoV/COVID19 Spike protein S Recombinant (S1+S2), His-tag

Description: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19), is an enveloped, single-stranded, positive-sense RNA virus that belongs to the Coronaviridae family 1. The SARS-CoV-2 genome, which shares 79.6% identity with SARS-CoV, encodes four essential structural proteins: the spike (S), envelope (E), membrane (M), and nucleocapsid protein (N) 2. The S protein is a transmembrane, homotrimeric, class I fusion glycoprotein that mediates viral attachment, fusion, and entry into host cells 3. Each ~180 kDa monomer contains two functional subunits, S1 (~700 a.a) and S2 (~600 a.a), that mediate viral attachment and membrane fusion, respectively. S1 contains two major domains, the N-terminal (NTD) and C-terminal domains (CTD). The CTD contains the receptor-binding domain (RBD), which binds to the angiotensin-converting enzyme 2 (ACE2) receptor on host cells 3-5. Although both SARS-CoV and SARS-CoV-2 bind the ACE2 receptor, the RBDs only share ~73% amino acid identity, and the SARS-CoV-2 RBD binds with a higher affinity compared to SARS-CoV 3, 6. The RBD is dynamic and undergoes hinge-like conformational changes, referred to as the “down” or “up” conformations, which hide or expose the receptor-binding motifs, respectively 7. Following receptor binding, S1 destabilizes, and TMPRSS2 cleaves S2, which undergoes a pre- to post-fusion conformation transition, allowing for membrane fusion 8, 9. The S protein has been the main focus of therapeutic and vaccine design as it is highly immunogenic. Both neutralizing antibodies 10,11 and memory T cells 12,13 targeting the S protein are present in the sera of convalescent COVID-19 patients.

Description: 2019 nCoV/COVID19 RBD domain of spike recombinant protein (S)- Fc tag (100 ug)

Description: 2019 nCoV/COVID19 RBD domain of spike recombinant protein (S)- Fc tag (500 ug)

Description: N/A

Description: SARS-CoV-2 (COVID-19) Trimeric Spike (S) Recombinant Protein Liquid

Description: 2019 nCoV/COVID19 RBD domain of spike recombinant protein (S), Biotinylated (100 ug)

Description: 2019 nCoV/COVID19 RBD domain of spike recombinant protein (S), Biotinylated (500 ug)