Table 2.

Expression levels (receptors per cell) of EGFR, HER2, and HER3 on various cancer cell lines and binding of IgG-43 as analyzed by flow cytometry.

				IgG 3–43 binding
	EGFR	HER2	HER3	(EC50 in pM)
MCF7	1,000	21,230	17,280	37
FaDu	143,250	15,800	2,880	30
BT474	7,220	> 572,000	11,240	59
A431	> 572,000	8,740	4,370	44
NCI-N87	16,180	> 572,000	3,320	27
A549	64,130	6,390	1,470	83
SKBR-3	29,800	> 572,000	14,080	42