Table 1. Kinetic Binding Constants for the Interaction between PSMA and the NBs, As Measured by SPR^a.

NB	Kon [M–1 s–1]	Koff [s–1]	KD [nM]
NB7	(7.1 × 105) ± (4.5 × 102)	(3.9 × 10–5) ± (2.8 × 10–7)	0.055
NB8	(2.0 × 104) ± (4.2 × 101)	(1.2 × 10–4) ± (5.3 × 10–7)	6.0
NB13	(3.6 × 104) ± (8.9 × 101)	(2.2 × 10–5) ± (9.9 × 10–7)	0.60
NB37	(2.2 × 104) ± (5.3 × 101)	(7.5 × 10–5) ± (6.6 × 10–7)	3.4

^aValues represent the mean ± SD.