Binding of lectins to lectin-resistant cell lines. For each cell line, cells were incubated with digoxigenin-labeled MAA or SNA lectins, followed by fluorescein isothiocyanate-labeled antidigoxigenin antibody, and then analyzed by FACS. Bold lines, binding of the MAA lectin; narrow lines, binding of the SNA lectin; shaded profiles, negative control (no lectin added).