DM1 (mertansine) is a thiol-containing derivative of maytansine. It binds to tubulin and inhibits the assembly of microtubules. DM1 is used to prepare ADCs (antibody-drug conjugates), such as trastuzumab emtansine (abbreviated as T-DM1). This BSA-DM1 conjugate is designed with similar linker chemistry as T-DM1 and is synthesized at CellMosaic