The Binding Activity of Huamn CNR1 with Anti-CNR1 recombinant Antibody. Activity: Measured by its binding ability in a functional ELISA. Immobilized Human CNR1(CSB-MP005678HU) at 10 μg/mL can bind Anti-CNR1 recombinant antibody, the EC<sub>50</sub> is 41.72-63.54 ng/mL.