Table 2.

Association and dissociation rate constants measured from kinetic fits of the surface plasmon resonance sensorgrams

Receptor	IgG1 Fc G0F					IgG1 Fc G0
	kON (mm−1s−1)	± error	kOFF (s−1)	± error	KD (nm)	kON (mm−1s−1)	± error	kOFF (s−1)	± error	KD (nm)
rCD16a-CT	39	11%	0.00506	14%	130	98	13%	0.00420	10%	43
rCD16b D129G-CT	306	18%	0.01853	16%	61	317	4%	0.00323	10%	100
rCD16a-Man5	437	19%	0.01729	16%	40	625	1%	0.00242	29%	3.9
rCD16b D129G-Man5	422	2%	0.00440	18%	10	685	4%	0.00246	20%	3.6