Table 1. Affinity of the Aptamers for S1 and RBD SARS-CoV-2 S Protein Domains.

	S1		RBD
	KD (nM)	R2	KD (nM)	R2
Apt1	10.2 ± 2.7	0.9875	39.0 ± 11.2	0.9903
Apt2	0.2 ± 0.1	0.9768	7.7 ± 1.4	0.9887
Apt3	5.3 ± 0.5	0.9976	10.9 ± 2.9	0.9706
Apt4	3.3 ± 0.7	0.9869	34.6 ± 17.8	0.9851
Apt5	11.3 ± 6.1	0.9810	29.8 ± 17.8	0.9713
Apt6	3.4 ± 1.1	0.9879	32.2 ± 7.3	0.9701
Apt1C	8.1 ± 1.0	0.9939	21.0 ± 2.7	0.9916
Apt4C	11.1 ± 2.7	0.9623	20.8 ± 5.4	0.9792