Table 1. Dissociation constants.

Fe-n-Lic	WT CeuE Kd/nM	H227L Kd/nM	H227A Kd/nM
4	21 ± 6	90 ± 30	131 ± 28
5	<10	22 ± 10	35 ± 14
6	33 ± 8	65 ± 21	41 ± 7
8	58 ± 8	112 ± 21	125 ± 36