The Binding Activity of Human CD74 with Anti-CD74 recombinant antibody. Activity: Measured by its binding ability in a functional ELISA. Immobilized Human CD74 (CSB-MP004956HU1(F2)) at 2 μg/mL can bind Anti-CD74 recombinant antibody, the EC<sub>50</sub> is 1.317-1.646 ng/mL.