Fig 2. ELISA binding of HLX10 to PD-1 ECD from different species.

The cross-reactivity of HLX10 binding to PD-1 extracellular domains (ECDs) of (a) human, (b) cynomolgus monkey, (c) mouse and (d) rat were determined using ELISA. HLX04, an unrelated human antibody mAb, was used as a negative control. All data points represent the mean man antibody human.