Downregulation of cluster of differentiation 98 (CD98) expression by anti‐l‐type amino‐acid transporter 1 monoclonal antibody (mAb). (a) HeLa cells were cultured without mAb (control), or with HBJ127 or SOL22 for 24 h, and stained with SOL69 followed by fluorescein isothiocyanate (FITC)‐conjugated anti rat IgG Fcγ. Reactivity was analyzed by flow cytometry, and the data are shown as mean fluorescence intensity (MFI). (b) HeLa cells cultured under standard conditions (control, left) or cultured with SOL69 (10 µg/mL) for 24 h (right) were stained with SOL69 followed by FITC‐conjugated anti rat IgG Fcγ, and observed under a fluorescence microscope.