ADC Control Human IgG1-sulfo-SPDB-DM4 is an antibody-drug conjugate (ADC) and can inhibit tubulin polymerization. The antibody portion is Human IgG1 kappa, Isotype Control (HY-P99001), and the drug-linker conjugate for ADC is sulfo-SPDB-DM4 (HY-101141)[1].