Table 5.
Thermodynamic parameters and binding affinity of glycol-NP - lectin interactions measured by ITC.56
| Entry | GNP | Ligand density | Lectin | ΔH (× 104 KJ mol−1) | -TΔS (× 104 KJ mol−1) | ΔG (KJ mol−1) | n | Na | Kd (nM)b | KD(μM)c | EF |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Man-AuNP | 3,600 | Con A | −10.8 | 10.8 | −39 | 0.00327 | 306 | 122 | 470 | 1.1 |
| 2 | Man2-AuNP | 1,400 | CVNMutDB | −0.67 | 0.66 | −44 | 0.00625 | 160 | 17 | 757 | 31 |
| 3 | Man2-AuNP | 110 | Con A | −3.06 | 3.05 | −39 | 0.0121 | 83 | 175 | 24 | 1.2 |
| 4 | Man2-AuNP | 260 | Con A | −2.84 | 2.83 | −40 | 0.0101 | 99 | 83 | 24 | 1.1 |
| 5 | Man2-AuNP | 1,400 | Con A | −4.64 | 4.63 | −43 | 0.00478 | 209 | 35 | 24 | 0.5 |
Number of binding sites on glyco-AuNP N = 1/n
Kd: dissociation constant of glyco-AuNP with lectin
KD: dissociation constant of the free carbohydrate ligand with lectin