Table 2.

Mapping of anti-RBD mAbs by binding competition assays^a

Group	Competing mAb	% Inhibition of binding by biotinylated mAb
		S6	S20	S37	S38
A	S6	92.22	13.41	94.71	-1.52
	S9	95.78	19.47	97.55	8.05
	S37	98.71	7.97	95.47	11.11
	S40	99.77	19.83	99.58	10.13
	S50	99.52	23.48	99.28	17.14
B	S20	27.78	99.77	24.47	98.96
	S38	27.45	98.92	24.85	99.20
	S53	28.64	68.23	32.24	62.78
C	S44	63.31	52.70	56.94	16.85
D	S25	95.06	83.29	93.56	85.78
E	S29	17.88	11.96	16.15	6.84
	S33	13.07	11.64	24.47	10.19

^aCompeting mAbs were tested at 100 μg/ml for the ability to block binding of the biotinylated mAbs to the RBD-Fc in ELISA. Greater than 40% inhibition was considered positive competition (values in bold). Negative numbers indicate increased binding of the biotinylated reagent.