The Binding Activity of Trastuzumab emtansine (Ado-Trastuzumab emtansine) and Cantuzumab ravtansine (Synonyms:IMGN242) with Anti-DM1&DM4 antibody. Activity: Measured by its binding ability in a functional ELISA. Immobilized Trastuzumab emtansine (Ado-Trastuzumab emtansine) and Cantuzumab ravtansine (Synonyms:IMGN242) at 2 μg/mL can bind Anti-DM1&DM4 antibody, the EC<sub>50</sub> is 4.981 to 6.7789 ng/mL and 5.507 to 9.043 ng/mL, respectively.