For downstream processes that utilize NGL COVID-19 Spike Protein Affinity Resin, Repligen offers the only kit on the market that includes the NGL COVID-19 Spike Protein Affinity Ligand standard for the most accurate quantitation. 

• Exact matched NGL COVID-19 Spike Protein Affinity Ligand standard ​
• Sensitivity of 0.2 ng/mL or 1.6 ppm​
• Recovery: 80-120%​
• Accuracy and Precision: inter-assay +/- 10%, Intra-assay +/- 15%​

Kit Contents:​

• Anti-protein A coated 96-well microtiter plate​
• Reagent A: sample diluent (5X)​
• Reagent B: NGL COVID-19 Spike Protein Affinity Ligand standard ​
• Reagent C: rabbit anti-Protein A: biotin probe​
• Reagent D: streptavidin: peroxidase conjugate ​
• Reagent E: TMB peroxidase substrate ​
• PBS packs (quantity 2)