. 2021 May 13;495:113071. doi: 10.1016/j.jim.2021.113071

Table 2.

Synthetic peptides (spots) of S protein of SARS-CoV-2 and their antibody recognition by the pools of COVID-19 patients' sera.

Spot (peptide)	Region	IgG	IgM	IgA
5	S1^A	−/+	+++/+++	+/++
17	S1^C	−/+++	+++/+++	−/+++
18*	S1^C	++/++	+/++	+++/++
20*	S1^C	−/−	−/−	++/−
21	S1^C	+++/+++	+/+++	+++/+++
22	S1^C	−/−	++/++	−/−
23	S1^C	+++/−	−/−	−/−
32	S2	−/−	+++/+++	−/++
34	S2	−/−	++/++	−/−
37	S2	++/+++	−/−	−/−
39	RBD	−/−	+++/+++	−/−
41	RBD	−/−	++/++	−/−
43	RBD	−/−	++/++	−/++
49	RBD	++/+++	+++/+++	−/+++
52	RBD	−/−	+++/+++	−/−
54	RBD	−/−	−/−	−/++
62	RBD	−/−	−/−	−/+++

Results Pool 1/Pool 2. “+” denotes positive result; number of “+” signifies relative increase in positive spot intensity in the membrane; “−” denote negative result. Chemical control spots, 61 and 62, are repetition of peptides 54 and 55. ^⁎ Peptides of SARS-CoV.