Table 1.

Inhibition Constants (Ki) for Erlotinib, Gefitinib, and Lapatinib (from reference [22]).

	EGFR	ErbB2	ErbB4
Erlotinib	0.7 nM	1.0 μM	1.5 μM
Gefitinib	0.4 nM	870 nM	1.1 μM
Lapatinib	3 nM	13 nM	347 nM