Table 2.

The affinity of the RBD – ACE2 interaction in the presence of disulfide-reducing agents at 37 °C determined from microscale thermophoresis (MST).

	Affinity (µM)
No compound	0.12 ± 0.05
2.5 mM TCEP	13.3 ± 4.0*
2.5 mM DTT	21.9 ± 13.6*
2.5 mM DTT oxidized	0.17 ± 0.08
10 mM NAC	0.57 ± 0.40
10 mM GSH	0.60 ± 0.38

^*Significant at p < 0.05.