Fig. 1.

Interaction of human metallothionein 1 A (hMT1A) with increasing concentrations of 20 nm NC AgNPs (0–8.7 mg/L) as monitored using surface plasmon resonance. Sensorgrams obtained on hMT1A-coated and on reference flow channels are shown in blue and red lines respectively. Each measurement cycle included sample injection, dissociation in buffer, regeneration with NaOH, buffer wash and a second regeneration with NaOH