①Measured by ACE2 protein binding ability in a functional ELISA.
Coat the plate with 0.2μg/well of SARS-CoV-2 S1 protein , add 100μl/well of ACE2 protein and 100μl/well of Peroxidase-Affinipure Goat Anti-Human IgG, Fcγ Fragment Specific . Wells were washed with buffer, and then A450 nm was measured. The results showed SARS-CoV-2 S1 protein could bind ACE2 protein. The EC50 is 56.64 - 103.6 ng/ml.
②Measured by ACE2 protein binding ability in a functional ELISA.
Coat the plate with 0.5μg/well of SARS-CoV-2 S1-RBD protein , add 100μl/well of ACE2 protein and 100μl/well of Peroxidase-Affinipure Goat Anti-Human IgG, Fcγ Fragment Specific . Wells were washed with buffer, and then A450 nm was measured. The results showed SARS-CoV-2 S1-RBD protein could bind ACE2 protein. The EC50 is 31.80 - 44.69 ng/ml.
③Measured by ACE2 protein binding ability in a functional ELISA.
Coat the plate with 0.5μg/well of SARS-CoV-2 S1-RBD protein , add 100μl/well of ACE2 protein and 100μl/well of Peroxidase-Affinipure Goat Anti-Human IgG, Fcγ Fragment Specific . Wells were washed with buffer, and then A450 nm was measured. The results showed SARS-CoV-2 S1-RBD protein could bind ACE2 protein. The EC50 is 2.785-9.139 ng/ml.
④Measured by ACE2 protein binding ability in a functional ELISA.
Coat the plate with 0.2μg/well of ACE2 protein, add 100μl/well of SARS-CoV-2 S1-RBD protein and 100μl/well of Peroxidase-Affinipure Goat Anti-Human IgG, Fcγ Fragment Specific . Wells were washed with buffer, and then A450 nm was measured. The results showed SARS-CoV-2 S1-RBD protein could bind ACE2 protein. The EC50 is 8.363-12.82 ng/ml ng/ml.
⑤The SPR sensorgram shows the binding between ACE2 protein and SARS-CoV-2 S1-RBD protein .
ACE2 protein was injected at 5 concentrations across 0.5 mg/ml of SARS-CoV-2 S1-RBD protein captured on a COOH chip. The results showed ACE2 protein could bind SARS-CoV-2 S1-RBD protein with an affinity constant of 100 nM.
⑥The SPR sensorgram shows the binding between ACE2 protein and SARS-CoV-2 S1-RBD protein .
ACE2 protein was injected at 5 concentrations across 0.5 mg/ml of SARS-CoV-2 S1-RBD protein captured on a COOH chip. The results showed ACE2 protein could bind SARS-CoV-2 S1-RBD protein with an affinity constant of 13.8 nM.