Table 1. Binding kinetics of the FP59 variants. Results were obtained from surface plasmon resonance analyses (n = 8 trials). Errors are the S.E.M.

Protein	ka (×106 M−1s−1)	kd (×10−3 s−1)	KD (pM)
FP59	5.9 ± 0.9	1.0 ± 0.2	170 ± 50
FP59rm	10 ± 10	0.63 ± 0.07	62 ± 4
FP59AGG	8 ± 1	1.2 ± 0.2	150 ± 20
FP59AGGrm	9 ± 1	1.1 ± 0.2	120 ± 10