CDC assay was performed as previously described method21 (link), using CLBL-1/luc cells (5 × 105 in 100 µl per well), either rat IgG2a (Thermo Fisher Scientific Inc.), 4E1-7, or chimeric antibodies, and LOW-TOX®-H rabbit complement (Cedarlane, Burlington, Canada; final concentration 1:40). Live and dead cells were counted using trypan blue dye exclusion assay. For chimeric antibody experiments, CLBL-1/luc cells (1 × 105 in 100 µl per well) were used instead of CLBL-1 cells, and live and dead cells were counted as described above.
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