3ug by SDS-PAGE under reducing condition and visualized by coomassie blue stain
SARS-CoV-2 Spike RBD is coated at 5ug/ml (100ul/well) can bind Human ACE-2. The ED50 range ≤ 100ng/ml.
Supplier Page from United States Biological for ACE-2, Recombinant, Human, aa18-740, His-Tag