U3-1784 is a humanized antibody expressed in CHO that targets FGFR4/CD334. U3-1784 is equipped with a huIgG1 heavy chain and a huλ light chain, with a predicted molecular weight (MW) of 150 kDa. The isotype control for U3-1784 can be referenced as Human IgG1 kappa, Isotype Control.