Table 2. Association Rate Constant k_a, Dissociation Rate Constant k_d, and Equilibrium Dissociation Constant K_D Characterizing the Interaction between Immobilized Human Recombinant Tropoelastin and Gd-TESMA/Gd₄TESMA^a.

analyte	ka (M–1 s–1)	kd (s–1)	KD (μM)
Gd-TESMA	880 ± 160	2.3 × 10–2 ± 0.5 × 10–2	28 ± 12
Gd4-TESMA	94 ± 40	3.4 × 10–3 ± 0.3 × 10–3	41 ± 12

^aValues are mean ± SD from triplicate measurements.